diff --git a/.rubocop.yml b/.rubocop.yml
new file mode 100644
index 0000000..70cb8ed
--- /dev/null
+++ b/.rubocop.yml
@@ -0,0 +1,32 @@
+# The behavior of RuboCop can be controlled via the .rubocop.yml
+# configuration file. It makes it possible to enable/disable
+# certain cops (checks) and to alter their behavior if they accept
+# any parameters. The file can be placed either in your home
+# directory or in some project directory.
+#
+# RuboCop will start looking for the configuration file in the directory
+# where the inspected file is and continue its way up to the root directory.
+#
+# See https://github.com/rubocop-hq/rubocop/blob/master/manual/configuration.md
+#
+require:
+  - rubocop-rails
+  - rubocop-rspec
+
+
+AllCops:
+  NewCops: enable
+  Exclude:
+  - 'bin/*'
+  - 'db/migrate/*'
+  - 'db/schema.rb'
+  - 'vendor/bundle/**/*'
+  - 'node_modules/**/*'
+
+
+Layout/LineLength:
+  AllowHeredoc: true
+  Max: 150
+
+Style/Documentation:
+  Enabled: false
diff --git a/Gemfile b/Gemfile
index 2293fd7..032d01e 100644
--- a/Gemfile
+++ b/Gemfile
@@ -1,15 +1,17 @@
+# frozen_string_literal: true
+
 source 'https://rubygems.org'
 git_source(:github) { |repo| "https://github.com/#{repo}.git" }
 
 ruby '2.6.1'
 
-gem 'rails'
+gem 'jbuilder'
 gem 'pg'
 gem 'puma'
+gem 'rails'
 gem 'sass-rails'
-gem 'webpacker'
 gem 'turbolinks'
-gem 'jbuilder'
+gem 'webpacker'
 # Use Redis adapter to run Action Cable in production
 # gem 'redis', '~> 4.0'
 # Use Active Model has_secure_password
@@ -23,8 +25,8 @@ gem 'bootsnap', '>= 1.4.2', require: false
 
 gem 'lockbox'
 
-gem 'aws-sdk-s3', require: false
 gem 'airrecord'
+gem 'aws-sdk-s3', require: false
 gem 'google-api-client'
 gem 'rack-cors'
 gem 'sentry-raven'
@@ -34,8 +36,11 @@ gem 'pagy'
 
 group :development, :test do
   # Call 'byebug' anywhere in the code to stop execution and get a debugger console
-  gem 'byebug', platforms: [:mri, :mingw, :x64_mingw]
+  gem 'byebug', platforms: %i[mri mingw x64_mingw]
   gem 'dotenv-rails'
+  gem 'rubocop', require: false
+  gem 'rubocop-rails', require: false
+  gem 'rubocop-rspec', require: false
 end
 
 group :development do
@@ -57,4 +62,4 @@ group :test do
 end
 
 # Windows does not include zoneinfo files, so bundle the tzinfo-data gem
-gem 'tzinfo-data', platforms: [:mingw, :mswin, :x64_mingw, :jruby]
+gem 'tzinfo-data', platforms: %i[mingw mswin x64_mingw jruby]
diff --git a/Gemfile.lock b/Gemfile.lock
index 3dca72a..afd19f8 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -61,6 +61,7 @@ GEM
     airrecord (1.0.5)
       faraday (>= 0.10, < 2.0)
       net-http-persistent (>= 2.9)
+    ast (2.4.0)
     aws-eventstream (1.0.3)
     aws-partitions (1.263.0)
     aws-sdk-core (3.89.1)
@@ -115,6 +116,7 @@ GEM
     httpclient (2.8.3)
     i18n (1.8.2)
       concurrent-ruby (~> 1.0)
+    jaro_winkler (1.5.4)
     jbuilder (2.10.0)
       activesupport (>= 5.0.0)
     jmespath (1.4.0)
@@ -154,6 +156,9 @@ GEM
       rack (>= 1.2, < 3)
     os (1.1.0)
     pagy (3.8.0)
+    parallel (1.19.1)
+    parser (2.7.1.1)
+      ast (~> 2.4.0)
     pg (1.2.3)
     public_suffix (4.0.4)
     puma (4.3.3)
@@ -191,6 +196,7 @@ GEM
       method_source
       rake (>= 0.8.7)
       thor (>= 0.20.3, < 2.0)
+    rainbow (3.0.0)
     rake (13.0.1)
     rb-fsevent (0.10.3)
     rb-inotify (0.10.1)
@@ -200,6 +206,22 @@ GEM
       declarative-option (< 0.2.0)
       uber (< 0.2.0)
     retriable (3.1.2)
+    rexml (3.2.4)
+    rubocop (0.82.0)
+      jaro_winkler (~> 1.5.1)
+      parallel (~> 1.10)
+      parser (>= 2.7.0.1)
+      rainbow (>= 2.2.2, < 4.0)
+      rexml
+      ruby-progressbar (~> 1.7)
+      unicode-display_width (>= 1.4.0, < 2.0)
+    rubocop-rails (2.5.2)
+      activesupport
+      rack (>= 1.1)
+      rubocop (>= 0.72.0)
+    rubocop-rspec (1.38.1)
+      rubocop (>= 0.68.1)
+    ruby-progressbar (1.10.1)
     sass-rails (6.0.0)
       sassc-rails (~> 2.1, >= 2.1.1)
     sassc (2.2.1)
@@ -246,6 +268,7 @@ GEM
     tzinfo (1.2.7)
       thread_safe (~> 0.1)
     uber (0.1.0)
+    unicode-display_width (1.7.0)
     webpacker (5.0.1)
       activesupport (>= 5.2)
       rack-proxy (>= 0.6.1)
@@ -274,6 +297,9 @@ DEPENDENCIES
   puma
   rack-cors
   rails
+  rubocop
+  rubocop-rails
+  rubocop-rspec
   sass-rails
   sentry-raven
   sequenced
diff --git a/Rakefile b/Rakefile
index e85f913..488c551 100644
--- a/Rakefile
+++ b/Rakefile
@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
 # Add your own tasks in files placed in lib/tasks ending in .rake,
 # for example lib/tasks/capistrano.rake, and they will automatically be available to Rake.
 
diff --git a/app/assets/stylesheets/application.css.scss b/app/assets/stylesheets/application.css.scss
index c19aef5..e13e405 100644
--- a/app/assets/stylesheets/application.css.scss
+++ b/app/assets/stylesheets/application.css.scss
@@ -28,7 +28,7 @@ $weight-bold: 400;
 
 @import "checkmark-icon";
 @import 'demo';
-@import 'highlight';
+@import 'prism';
 
 .field_with_errors input {
   border-color: $red;
diff --git a/app/assets/stylesheets/highlight.css.scss b/app/assets/stylesheets/highlight.css.scss
deleted file mode 100644
index 87e256f..0000000
--- a/app/assets/stylesheets/highlight.css.scss
+++ /dev/null
@@ -1,5 +0,0 @@
-code.html .hljs-tag:first-child .hljs-attr, code.html .hljs-tag:first-child .hljs-string {
-  font-weight: bold;
-  font-size: 1.2em;
-}
-
diff --git a/app/assets/stylesheets/prism.css.scss b/app/assets/stylesheets/prism.css.scss
new file mode 100644
index 0000000..00a575a
--- /dev/null
+++ b/app/assets/stylesheets/prism.css.scss
@@ -0,0 +1,131 @@
+/* PrismJS 1.20.0
+https://prismjs.com/download.html#themes=prism-okaidia&languages=markup+css+clike+javascript&plugins=custom-class */
+/**
+ * okaidia theme for JavaScript, CSS and HTML
+ * Loosely based on Monokai textmate theme by http://www.monokai.nl/
+ * @author ocodia
+ */
+
+code.language-html > .prism-tag:first-child {
+  font-weight: bold;
+  font-size: 1.1em;
+}
+
+code[class*="language-"],
+pre[class*="language-"] {
+	color: #f8f8f2;
+	background: none;
+	text-shadow: 0 1px rgba(0, 0, 0, 0.3);
+	font-family: Consolas, Monaco, 'Andale Mono', 'Ubuntu Mono', monospace;
+	font-size: 1em;
+	text-align: left;
+	white-space: pre;
+	word-spacing: normal;
+	word-break: normal;
+	word-wrap: normal;
+	line-height: 1.5;
+
+	-moz-tab-size: 4;
+	-o-tab-size: 4;
+	tab-size: 4;
+
+	-webkit-hyphens: none;
+	-moz-hyphens: none;
+	-ms-hyphens: none;
+	hyphens: none;
+}
+
+/* Code blocks */
+pre[class*="language-"] {
+	padding: 1em;
+	margin: .5em 0;
+	overflow: auto;
+	border-radius: 0.3em;
+}
+
+:not(pre) > code[class*="language-"],
+pre[class*="language-"] {
+	background: #272822;
+}
+
+/* Inline code */
+:not(pre) > code[class*="language-"] {
+	padding: .1em;
+	border-radius: .3em;
+	white-space: normal;
+}
+
+.prism-token.prism-comment,
+.prism-token.prism-prolog,
+.prism-token.prism-doctype,
+.prism-token.prism-cdata {
+	color: slategray;
+}
+
+.prism-token.prism-punctuation {
+	color: #f8f8f2;
+}
+
+.prism-token.prism-namespace {
+	opacity: .7;
+}
+
+.prism-token.prism-property,
+.prism-token.prism-tag,
+.prism-token.prism-constant,
+.prism-token.prism-symbol,
+.prism-token.prism-deleted {
+	color: #f92672;
+}
+
+.prism-token.prism-boolean,
+.prism-token.prism-number {
+	color: #ae81ff;
+}
+
+.prism-token.prism-selector,
+.prism-token.prism-attr-name,
+.prism-token.prism-string,
+.prism-token.prism-char,
+.prism-token.prism-builtin,
+.prism-token.prism-inserted {
+	color: #a6e22e;
+}
+
+.prism-token.prism-operator,
+.prism-token.prism-entity,
+.prism-token.prism-url,
+.prism-language-css .prism-token.prism-string,
+.prism-style .prism-token.prism-string,
+.prism-token.prism-variable {
+	color: #f8f8f2;
+}
+
+.prism-token.prism-atrule,
+.prism-token.prism-attr-value,
+.prism-token.prism-function,
+.prism-token.prism-class-name {
+	color: #e6db74;
+}
+
+.prism-token.prism-keyword {
+	color: #66d9ef;
+}
+
+.prism-token.prism-regex,
+.token.important {
+	color: #fd971f;
+}
+
+.prism-token.prism-important,
+.prism-token.prism-bold {
+	font-weight: bold;
+}
+.prism-token.prism-italic {
+	font-style: italic;
+}
+
+.prism-token.prism-entity {
+	cursor: help;
+}
+
diff --git a/app/channels/application_cable/channel.rb b/app/channels/application_cable/channel.rb
index d672697..9aec230 100644
--- a/app/channels/application_cable/channel.rb
+++ b/app/channels/application_cable/channel.rb
@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
 module ApplicationCable
   class Channel < ActionCable::Channel::Base
   end
diff --git a/app/channels/application_cable/connection.rb b/app/channels/application_cable/connection.rb
index 0ff5442..8d6c2a1 100644
--- a/app/channels/application_cable/connection.rb
+++ b/app/channels/application_cable/connection.rb
@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
 module ApplicationCable
   class Connection < ActionCable::Connection::Base
   end
diff --git a/app/controllers/application_controller.rb b/app/controllers/application_controller.rb
index 569d38a..dcb873a 100644
--- a/app/controllers/application_controller.rb
+++ b/app/controllers/application_controller.rb
@@ -1,9 +1,11 @@
+# frozen_string_literal: true
+
 class ApplicationController < ActionController::Base
   helper_method :current_user, :logged_in?
   include Pagy::Backend
 
   def require_login
-    redirect_to login_url unless current_user.present?
+    redirect_to login_url if current_user.blank?
   end
 
   def current_user
diff --git a/app/controllers/file_uploads_controller.rb b/app/controllers/file_uploads_controller.rb
index ad487ca..c333313 100644
--- a/app/controllers/file_uploads_controller.rb
+++ b/app/controllers/file_uploads_controller.rb
@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
 class FileUploadsController < ApplicationController
   def show
     @form = Form.find_by!(token: params[:form_id])
diff --git a/app/controllers/forms_controller.rb b/app/controllers/forms_controller.rb
index 7cd7f96..07fb203 100644
--- a/app/controllers/forms_controller.rb
+++ b/app/controllers/forms_controller.rb
@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
 require 'google/apis/sheets_v4'
 require 'google/api_client/client_secrets'
 class FormsController < ApplicationController
diff --git a/app/controllers/home_controller.rb b/app/controllers/home_controller.rb
index eb9edfa..1577715 100644
--- a/app/controllers/home_controller.rb
+++ b/app/controllers/home_controller.rb
@@ -1,5 +1,6 @@
-class HomeController < ApplicationController
+# frozen_string_literal: true
 
+class HomeController < ApplicationController
   def index
     redirect_to forms_url if logged_in?
   end
diff --git a/app/controllers/oauths_controller.rb b/app/controllers/oauths_controller.rb
index a7e7f23..7cbffc5 100644
--- a/app/controllers/oauths_controller.rb
+++ b/app/controllers/oauths_controller.rb
@@ -1,5 +1,6 @@
-class OauthsController < ApplicationController
+# frozen_string_literal: true
 
+class OauthsController < ApplicationController
   # Sends the user on a trip to the provider,
   # and after authorizing there back to the callback url.
   def oauth
@@ -9,26 +10,25 @@ class OauthsController < ApplicationController
   def callback
     provider = params[:provider]
     if @user = login_from(provider)
-      redirect_to root_path, :notice => "Logged in from #{provider.titleize}!"
+      redirect_to root_path, notice: "Logged in from #{provider.titleize}!"
     else
       begin
         @user = create_from(provider)
         if authentication = @user.authentications.find_by(provider: provider)
           authentication.update({
-            access_token: @access_token.token,
-            refresh_token: @access_token.refresh_token,
-            expires_at: Time.at(@access_token.expires_at)
-          })
+                                  access_token: @access_token.token,
+                                  refresh_token: @access_token.refresh_token,
+                                  expires_at: Time.zone.at(@access_token.expires_at)
+                                })
         end
 
         reset_session
         auto_login(@user)
-        redirect_to root_path, :notice => "Logged in from #{provider.titleize}!"
-      rescue
+        redirect_to root_path, notice: "Logged in from #{provider.titleize}!"
+      rescue StandardError
         Rails.logger.error("Failed to login from #{provider}")
-        redirect_to root_path, :alert => "Failed to login from #{provider.titleize}!"
+        redirect_to root_path, alert: "Failed to login from #{provider.titleize}!"
       end
     end
   end
-
 end
diff --git a/app/controllers/sessions_controller.rb b/app/controllers/sessions_controller.rb
index 9265f5a..ebb987b 100644
--- a/app/controllers/sessions_controller.rb
+++ b/app/controllers/sessions_controller.rb
@@ -1,5 +1,6 @@
-class SessionsController < ApplicationController
+# frozen_string_literal: true
 
+class SessionsController < ApplicationController
   def new
     reset_session
   end
@@ -8,5 +9,4 @@ class SessionsController < ApplicationController
     reset_session
     redirect_to root_url
   end
-
 end
diff --git a/app/controllers/submissions_controller.rb b/app/controllers/submissions_controller.rb
index 262ac9b..3c7f792 100644
--- a/app/controllers/submissions_controller.rb
+++ b/app/controllers/submissions_controller.rb
@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
 require 'google/apis/sheets_v4'
 class SubmissionsController < ApplicationController
   skip_before_action :verify_authenticity_token
@@ -14,10 +16,14 @@ class SubmissionsController < ApplicationController
 
     respond_to do |format|
       if @submission.save
-        format.html { redirect_to(@form.thank_you_url) if @form.thank_you_url.present? }
+        format.html do
+          redirect_to(@form.thank_you_url) if @form.thank_you_url.present?
+        end
         format.json { render(json: { success: true, submission: @submission.data }) }
       else
-        format.html { redirect_to(@form.thank_you_url) if @form.thank_you_url.present? }
+        format.html do
+          redirect_to(@form.thank_you_url) if @form.thank_you_url.present?
+        end
         format.json { render(json: { error: @submission.errors }, status: 422) }
       end
     end
diff --git a/app/helpers/application_helper.rb b/app/helpers/application_helper.rb
index 41244f6..c2ebd8c 100644
--- a/app/helpers/application_helper.rb
+++ b/app/helpers/application_helper.rb
@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
 module ApplicationHelper
     include Pagy::Frontend
 end
diff --git a/app/javascript/highlight.js b/app/javascript/highlight.js
deleted file mode 100644
index e48cb54..0000000
--- a/app/javascript/highlight.js
+++ /dev/null
@@ -1,7 +0,0 @@
-document.addEventListener("turbolinks:load", function () {
-  document.querySelectorAll('pre code').forEach(function (block) {
-    if (window.hljs) {
-      hljs.highlightBlock(block);
-    }
-  });
-});
diff --git a/app/javascript/packs/application.js b/app/javascript/packs/application.js
index 65acde0..c461d69 100644
--- a/app/javascript/packs/application.js
+++ b/app/javascript/packs/application.js
@@ -13,7 +13,7 @@ require('tinyforms');
 require('demo');
 require('backend_typed');
 require('tabs');
-require('highlight');
+require('prism');
 
 // Uncomment to copy all static images under ../images to the output folder and reference
 // them with the image_pack_tag helper in views (e.g <%= image_pack_tag 'rails.png' %>)
diff --git a/app/javascript/prism.js b/app/javascript/prism.js
new file mode 100644
index 0000000..4b7d153
--- /dev/null
+++ b/app/javascript/prism.js
@@ -0,0 +1,17 @@
+window.Prism = window.Prism || {};
+window.Prism.manual = true;
+document.addEventListener("turbolinks:load", function () {
+  Prism.plugins.customClass.prefix('prism-');
+  document.querySelectorAll('pre code').forEach(function (el) {
+    Prism.highlightElement(el);
+  });
+});
+
+/* PrismJS 1.20.0
+https://prismjs.com/download.html#themes=prism-okaidia&languages=markup+css+clike+javascript&plugins=custom-class */
+var _self="undefined"!=typeof window?window:"undefined"!=typeof WorkerGlobalScope&&self instanceof WorkerGlobalScope?self:{},Prism=function(u){var c=/\blang(?:uage)?-([\w-]+)\b/i,n=0,C={manual:u.Prism&&u.Prism.manual,disableWorkerMessageHandler:u.Prism&&u.Prism.disableWorkerMessageHandler,util:{encode:function e(n){return n instanceof _?new _(n.type,e(n.content),n.alias):Array.isArray(n)?n.map(e):n.replace(/&/g,"&amp;").replace(/</g,"&lt;").replace(/\u00a0/g," ")},type:function(e){return Object.prototype.toString.call(e).slice(8,-1)},objId:function(e){return e.__id||Object.defineProperty(e,"__id",{value:++n}),e.__id},clone:function t(e,r){var a,n,l=C.util.type(e);switch(r=r||{},l){case"Object":if(n=C.util.objId(e),r[n])return r[n];for(var i in a={},r[n]=a,e)e.hasOwnProperty(i)&&(a[i]=t(e[i],r));return a;case"Array":return n=C.util.objId(e),r[n]?r[n]:(a=[],r[n]=a,e.forEach(function(e,n){a[n]=t(e,r)}),a);default:return e}},getLanguage:function(e){for(;e&&!c.test(e.className);)e=e.parentElement;return e?(e.className.match(c)||[,"none"])[1].toLowerCase():"none"},currentScript:function(){if("undefined"==typeof document)return null;if("currentScript"in document)return document.currentScript;try{throw new Error}catch(e){var n=(/at [^(\r\n]*\((.*):.+:.+\)$/i.exec(e.stack)||[])[1];if(n){var t=document.getElementsByTagName("script");for(var r in t)if(t[r].src==n)return t[r]}return null}}},languages:{extend:function(e,n){var t=C.util.clone(C.languages[e]);for(var r in n)t[r]=n[r];return t},insertBefore:function(t,e,n,r){var a=(r=r||C.languages)[t],l={};for(var i in a)if(a.hasOwnProperty(i)){if(i==e)for(var o in n)n.hasOwnProperty(o)&&(l[o]=n[o]);n.hasOwnProperty(i)||(l[i]=a[i])}var s=r[t];return r[t]=l,C.languages.DFS(C.languages,function(e,n){n===s&&e!=t&&(this[e]=l)}),l},DFS:function e(n,t,r,a){a=a||{};var l=C.util.objId;for(var i in n)if(n.hasOwnProperty(i)){t.call(n,i,n[i],r||i);var o=n[i],s=C.util.type(o);"Object"!==s||a[l(o)]?"Array"!==s||a[l(o)]||(a[l(o)]=!0,e(o,t,i,a)):(a[l(o)]=!0,e(o,t,null,a))}}},plugins:{},highlightAll:function(e,n){C.highlightAllUnder(document,e,n)},highlightAllUnder:function(e,n,t){var r={callback:t,container:e,selector:'code[class*="language-"], [class*="language-"] code, code[class*="lang-"], [class*="lang-"] code'};C.hooks.run("before-highlightall",r),r.elements=Array.prototype.slice.apply(r.container.querySelectorAll(r.selector)),C.hooks.run("before-all-elements-highlight",r);for(var a,l=0;a=r.elements[l++];)C.highlightElement(a,!0===n,r.callback)},highlightElement:function(e,n,t){var r=C.util.getLanguage(e),a=C.languages[r];e.className=e.className.replace(c,"").replace(/\s+/g," ")+" language-"+r;var l=e.parentNode;l&&"pre"===l.nodeName.toLowerCase()&&(l.className=l.className.replace(c,"").replace(/\s+/g," ")+" language-"+r);var i={element:e,language:r,grammar:a,code:e.textContent};function o(e){i.highlightedCode=e,C.hooks.run("before-insert",i),i.element.innerHTML=i.highlightedCode,C.hooks.run("after-highlight",i),C.hooks.run("complete",i),t&&t.call(i.element)}if(C.hooks.run("before-sanity-check",i),!i.code)return C.hooks.run("complete",i),void(t&&t.call(i.element));if(C.hooks.run("before-highlight",i),i.grammar)if(n&&u.Worker){var s=new Worker(C.filename);s.onmessage=function(e){o(e.data)},s.postMessage(JSON.stringify({language:i.language,code:i.code,immediateClose:!0}))}else o(C.highlight(i.code,i.grammar,i.language));else o(C.util.encode(i.code))},highlight:function(e,n,t){var r={code:e,grammar:n,language:t};return C.hooks.run("before-tokenize",r),r.tokens=C.tokenize(r.code,r.grammar),C.hooks.run("after-tokenize",r),_.stringify(C.util.encode(r.tokens),r.language)},tokenize:function(e,n){var t=n.rest;if(t){for(var r in t)n[r]=t[r];delete n.rest}var a=new l;return M(a,a.head,e),function e(n,t,r,a,l,i,o){for(var s in r)if(r.hasOwnProperty(s)&&r[s]){var u=r[s];u=Array.isArray(u)?u:[u];for(var c=0;c<u.length;++c){if(o&&o==s+","+c)return;var g=u[c],f=g.inside,h=!!g.lookbehind,d=!!g.greedy,v=0,p=g.alias;if(d&&!g.pattern.global){var m=g.pattern.toString().match(/[imsuy]*$/)[0];g.pattern=RegExp(g.pattern.source,m+"g")}g=g.pattern||g;for(var y=a.next,k=l;y!==t.tail;k+=y.value.length,y=y.next){var b=y.value;if(t.length>n.length)return;if(!(b instanceof _)){var x=1;if(d&&y!=t.tail.prev){g.lastIndex=k;var w=g.exec(n);if(!w)break;var A=w.index+(h&&w[1]?w[1].length:0),P=w.index+w[0].length,S=k;for(S+=y.value.length;S<=A;)y=y.next,S+=y.value.length;if(S-=y.value.length,k=S,y.value instanceof _)continue;for(var O=y;O!==t.tail&&(S<P||"string"==typeof O.value&&!O.prev.value.greedy);O=O.next)x++,S+=O.value.length;x--,b=n.slice(k,S),w.index-=k}else{g.lastIndex=0;var w=g.exec(b)}if(w){h&&(v=w[1]?w[1].length:0);var A=w.index+v,w=w[0].slice(v),P=A+w.length,E=b.slice(0,A),N=b.slice(P),j=y.prev;E&&(j=M(t,j,E),k+=E.length),W(t,j,x);var L=new _(s,f?C.tokenize(w,f):w,p,w,d);if(y=M(t,j,L),N&&M(t,y,N),1<x&&e(n,t,r,y.prev,k,!0,s+","+c),i)break}else if(i)break}}}}}(e,a,n,a.head,0),function(e){var n=[],t=e.head.next;for(;t!==e.tail;)n.push(t.value),t=t.next;return n}(a)},hooks:{all:{},add:function(e,n){var t=C.hooks.all;t[e]=t[e]||[],t[e].push(n)},run:function(e,n){var t=C.hooks.all[e];if(t&&t.length)for(var r,a=0;r=t[a++];)r(n)}},Token:_};function _(e,n,t,r,a){this.type=e,this.content=n,this.alias=t,this.length=0|(r||"").length,this.greedy=!!a}function l(){var e={value:null,prev:null,next:null},n={value:null,prev:e,next:null};e.next=n,this.head=e,this.tail=n,this.length=0}function M(e,n,t){var r=n.next,a={value:t,prev:n,next:r};return n.next=a,r.prev=a,e.length++,a}function W(e,n,t){for(var r=n.next,a=0;a<t&&r!==e.tail;a++)r=r.next;(n.next=r).prev=n,e.length-=a}if(u.Prism=C,_.stringify=function n(e,t){if("string"==typeof e)return e;if(Array.isArray(e)){var r="";return e.forEach(function(e){r+=n(e,t)}),r}var a={type:e.type,content:n(e.content,t),tag:"span",classes:["token",e.type],attributes:{},language:t},l=e.alias;l&&(Array.isArray(l)?Array.prototype.push.apply(a.classes,l):a.classes.push(l)),C.hooks.run("wrap",a);var i="";for(var o in a.attributes)i+=" "+o+'="'+(a.attributes[o]||"").replace(/"/g,"&quot;")+'"';return"<"+a.tag+' class="'+a.classes.join(" ")+'"'+i+">"+a.content+"</"+a.tag+">"},!u.document)return u.addEventListener&&(C.disableWorkerMessageHandler||u.addEventListener("message",function(e){var n=JSON.parse(e.data),t=n.language,r=n.code,a=n.immediateClose;u.postMessage(C.highlight(r,C.languages[t],t)),a&&u.close()},!1)),C;var e=C.util.currentScript();function t(){C.manual||C.highlightAll()}if(e&&(C.filename=e.src,e.hasAttribute("data-manual")&&(C.manual=!0)),!C.manual){var r=document.readyState;"loading"===r||"interactive"===r&&e&&e.defer?document.addEventListener("DOMContentLoaded",t):window.requestAnimationFrame?window.requestAnimationFrame(t):window.setTimeout(t,16)}return C}(_self);"undefined"!=typeof module&&module.exports&&(module.exports=Prism),"undefined"!=typeof global&&(global.Prism=Prism);
+Prism.languages.markup={comment:/<!--[\s\S]*?-->/,prolog:/<\?[\s\S]+?\?>/,doctype:{pattern:/<!DOCTYPE(?:[^>"'[\]]|"[^"]*"|'[^']*')+(?:\[(?:[^<"'\]]|"[^"]*"|'[^']*'|<(?!!--)|<!--(?:[^-]|-(?!->))*-->)*\]\s*)?>/i,greedy:!0},cdata:/<!\[CDATA\[[\s\S]*?]]>/i,tag:{pattern:/<\/?(?!\d)[^\s>\/=$<%]+(?:\s(?:\s*[^\s>\/=]+(?:\s*=\s*(?:"[^"]*"|'[^']*'|[^\s'">=]+(?=[\s>]))|(?=[\s/>])))+)?\s*\/?>/i,greedy:!0,inside:{tag:{pattern:/^<\/?[^\s>\/]+/i,inside:{punctuation:/^<\/?/,namespace:/^[^\s>\/:]+:/}},"attr-value":{pattern:/=\s*(?:"[^"]*"|'[^']*'|[^\s'">=]+)/i,inside:{punctuation:[/^=/,{pattern:/^(\s*)["']|["']$/,lookbehind:!0}]}},punctuation:/\/?>/,"attr-name":{pattern:/[^\s>\/]+/,inside:{namespace:/^[^\s>\/:]+:/}}}},entity:/&#?[\da-z]{1,8};/i},Prism.languages.markup.tag.inside["attr-value"].inside.entity=Prism.languages.markup.entity,Prism.hooks.add("wrap",function(a){"entity"===a.type&&(a.attributes.title=a.content.replace(/&amp;/,"&"))}),Object.defineProperty(Prism.languages.markup.tag,"addInlined",{value:function(a,e){var s={};s["language-"+e]={pattern:/(^<!\[CDATA\[)[\s\S]+?(?=\]\]>$)/i,lookbehind:!0,inside:Prism.languages[e]},s.cdata=/^<!\[CDATA\[|\]\]>$/i;var n={"included-cdata":{pattern:/<!\[CDATA\[[\s\S]*?\]\]>/i,inside:s}};n["language-"+e]={pattern:/[\s\S]+/,inside:Prism.languages[e]};var t={};t[a]={pattern:RegExp("(<__[^]*?>)(?:<!\\[CDATA\\[(?:[^\\]]|\\](?!\\]>))*\\]\\]>|(?!<!\\[CDATA\\[)[^])*?(?=</__>)".replace(/__/g,function(){return a}),"i"),lookbehind:!0,greedy:!0,inside:n},Prism.languages.insertBefore("markup","cdata",t)}}),Prism.languages.xml=Prism.languages.extend("markup",{}),Prism.languages.html=Prism.languages.markup,Prism.languages.mathml=Prism.languages.markup,Prism.languages.svg=Prism.languages.markup;
+!function(s){var e=/("|')(?:\\(?:\r\n|[\s\S])|(?!\1)[^\\\r\n])*\1/;s.languages.css={comment:/\/\*[\s\S]*?\*\//,atrule:{pattern:/@[\w-]+[\s\S]*?(?:;|(?=\s*\{))/,inside:{rule:/^@[\w-]+/,"selector-function-argument":{pattern:/(\bselector\s*\((?!\s*\))\s*)(?:[^()]|\((?:[^()]|\([^()]*\))*\))+?(?=\s*\))/,lookbehind:!0,alias:"selector"}}},url:{pattern:RegExp("url\\((?:"+e.source+"|[^\n\r()]*)\\)","i"),greedy:!0,inside:{function:/^url/i,punctuation:/^\(|\)$/}},selector:RegExp("[^{}\\s](?:[^{};\"']|"+e.source+")*?(?=\\s*\\{)"),string:{pattern:e,greedy:!0},property:/[-_a-z\xA0-\uFFFF][-\w\xA0-\uFFFF]*(?=\s*:)/i,important:/!important\b/i,function:/[-a-z0-9]+(?=\()/i,punctuation:/[(){};:,]/},s.languages.css.atrule.inside.rest=s.languages.css;var t=s.languages.markup;t&&(t.tag.addInlined("style","css"),s.languages.insertBefore("inside","attr-value",{"style-attr":{pattern:/\s*style=("|')(?:\\[\s\S]|(?!\1)[^\\])*\1/i,inside:{"attr-name":{pattern:/^\s*style/i,inside:t.tag.inside},punctuation:/^\s*=\s*['"]|['"]\s*$/,"attr-value":{pattern:/.+/i,inside:s.languages.css}},alias:"language-css"}},t.tag))}(Prism);
+Prism.languages.clike={comment:[{pattern:/(^|[^\\])\/\*[\s\S]*?(?:\*\/|$)/,lookbehind:!0},{pattern:/(^|[^\\:])\/\/.*/,lookbehind:!0,greedy:!0}],string:{pattern:/(["'])(?:\\(?:\r\n|[\s\S])|(?!\1)[^\\\r\n])*\1/,greedy:!0},"class-name":{pattern:/(\b(?:class|interface|extends|implements|trait|instanceof|new)\s+|\bcatch\s+\()[\w.\\]+/i,lookbehind:!0,inside:{punctuation:/[.\\]/}},keyword:/\b(?:if|else|while|do|for|return|in|instanceof|function|new|try|throw|catch|finally|null|break|continue)\b/,boolean:/\b(?:true|false)\b/,function:/\w+(?=\()/,number:/\b0x[\da-f]+\b|(?:\b\d+\.?\d*|\B\.\d+)(?:e[+-]?\d+)?/i,operator:/[<>]=?|[!=]=?=?|--?|\+\+?|&&?|\|\|?|[?*/~^%]/,punctuation:/[{}[\];(),.:]/};
+Prism.languages.javascript=Prism.languages.extend("clike",{"class-name":[Prism.languages.clike["class-name"],{pattern:/(^|[^$\w\xA0-\uFFFF])[_$A-Z\xA0-\uFFFF][$\w\xA0-\uFFFF]*(?=\.(?:prototype|constructor))/,lookbehind:!0}],keyword:[{pattern:/((?:^|})\s*)(?:catch|finally)\b/,lookbehind:!0},{pattern:/(^|[^.]|\.\.\.\s*)\b(?:as|async(?=\s*(?:function\b|\(|[$\w\xA0-\uFFFF]|$))|await|break|case|class|const|continue|debugger|default|delete|do|else|enum|export|extends|for|from|function|get|if|implements|import|in|instanceof|interface|let|new|null|of|package|private|protected|public|return|set|static|super|switch|this|throw|try|typeof|undefined|var|void|while|with|yield)\b/,lookbehind:!0}],number:/\b(?:(?:0[xX](?:[\dA-Fa-f](?:_[\dA-Fa-f])?)+|0[bB](?:[01](?:_[01])?)+|0[oO](?:[0-7](?:_[0-7])?)+)n?|(?:\d(?:_\d)?)+n|NaN|Infinity)\b|(?:\b(?:\d(?:_\d)?)+\.?(?:\d(?:_\d)?)*|\B\.(?:\d(?:_\d)?)+)(?:[Ee][+-]?(?:\d(?:_\d)?)+)?/,function:/#?[_$a-zA-Z\xA0-\uFFFF][$\w\xA0-\uFFFF]*(?=\s*(?:\.\s*(?:apply|bind|call)\s*)?\()/,operator:/--|\+\+|\*\*=?|=>|&&|\|\||[!=]==|<<=?|>>>?=?|[-+*/%&|^!=<>]=?|\.{3}|\?[.?]?|[~:]/}),Prism.languages.javascript["class-name"][0].pattern=/(\b(?:class|interface|extends|implements|instanceof|new)\s+)[\w.\\]+/,Prism.languages.insertBefore("javascript","keyword",{regex:{pattern:/((?:^|[^$\w\xA0-\uFFFF."'\])\s])\s*)\/(?:\[(?:[^\]\\\r\n]|\\.)*]|\\.|[^/\\\[\r\n])+\/[gimyus]{0,6}(?=(?:\s|\/\*(?:[^*]|\*(?!\/))*\*\/)*(?:$|[\r\n,.;:})\]]|\/\/))/,lookbehind:!0,greedy:!0},"function-variable":{pattern:/#?[_$a-zA-Z\xA0-\uFFFF][$\w\xA0-\uFFFF]*(?=\s*[=:]\s*(?:async\s*)?(?:\bfunction\b|(?:\((?:[^()]|\([^()]*\))*\)|[_$a-zA-Z\xA0-\uFFFF][$\w\xA0-\uFFFF]*)\s*=>))/,alias:"function"},parameter:[{pattern:/(function(?:\s+[_$A-Za-z\xA0-\uFFFF][$\w\xA0-\uFFFF]*)?\s*\(\s*)(?!\s)(?:[^()]|\([^()]*\))+?(?=\s*\))/,lookbehind:!0,inside:Prism.languages.javascript},{pattern:/[_$a-z\xA0-\uFFFF][$\w\xA0-\uFFFF]*(?=\s*=>)/i,inside:Prism.languages.javascript},{pattern:/(\(\s*)(?!\s)(?:[^()]|\([^()]*\))+?(?=\s*\)\s*=>)/,lookbehind:!0,inside:Prism.languages.javascript},{pattern:/((?:\b|\s|^)(?!(?:as|async|await|break|case|catch|class|const|continue|debugger|default|delete|do|else|enum|export|extends|finally|for|from|function|get|if|implements|import|in|instanceof|interface|let|new|null|of|package|private|protected|public|return|set|static|super|switch|this|throw|try|typeof|undefined|var|void|while|with|yield)(?![$\w\xA0-\uFFFF]))(?:[_$A-Za-z\xA0-\uFFFF][$\w\xA0-\uFFFF]*\s*)\(\s*)(?!\s)(?:[^()]|\([^()]*\))+?(?=\s*\)\s*\{)/,lookbehind:!0,inside:Prism.languages.javascript}],constant:/\b[A-Z](?:[A-Z_]|\dx?)*\b/}),Prism.languages.insertBefore("javascript","string",{"template-string":{pattern:/`(?:\\[\s\S]|\${(?:[^{}]|{(?:[^{}]|{[^}]*})*})+}|(?!\${)[^\\`])*`/,greedy:!0,inside:{"template-punctuation":{pattern:/^`|`$/,alias:"string"},interpolation:{pattern:/((?:^|[^\\])(?:\\{2})*)\${(?:[^{}]|{(?:[^{}]|{[^}]*})*})+}/,lookbehind:!0,inside:{"interpolation-punctuation":{pattern:/^\${|}$/,alias:"punctuation"},rest:Prism.languages.javascript}},string:/[\s\S]+/}}}),Prism.languages.markup&&Prism.languages.markup.tag.addInlined("script","javascript"),Prism.languages.js=Prism.languages.javascript;
+!function(){if("undefined"!=typeof self&&self.Prism||"undefined"!=typeof global&&global.Prism){var a,e,t="";Prism.plugins.customClass={add:function(n){a=n},map:function(s){e="function"==typeof s?s:function(n){return s[n]||n}},prefix:function(n){t=n||""}},Prism.hooks.add("wrap",function(s){if(a){var n=a({content:s.content,type:s.type,language:s.language});Array.isArray(n)?s.classes.push.apply(s.classes,n):n&&s.classes.push(n)}(e||t)&&(s.classes=s.classes.map(function(n){return t+(e?e(n,s.language):n)}))})}}();
diff --git a/app/jobs/application_job.rb b/app/jobs/application_job.rb
index d394c3d..bef3959 100644
--- a/app/jobs/application_job.rb
+++ b/app/jobs/application_job.rb
@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
 class ApplicationJob < ActiveJob::Base
   # Automatically retry jobs that encountered a deadlock
   # retry_on ActiveRecord::Deadlocked
diff --git a/app/jobs/submission_append_job.rb b/app/jobs/submission_append_job.rb
index 096e5b0..7bfc68e 100644
--- a/app/jobs/submission_append_job.rb
+++ b/app/jobs/submission_append_job.rb
@@ -1,8 +1,10 @@
+# frozen_string_literal: true
+
 class SubmissionAppendJob < ApplicationJob
   queue_as :default
 
-  rescue_from(Signet::AuthorizationError, Google::Apis::AuthorizationError) do |exception|
-    submission_id = self.arguments.first
+  rescue_from(Signet::AuthorizationError, Google::Apis::AuthorizationError) do |_exception|
+    submission_id = arguments.first
     Rails.logger.error("AuthorizationError during SubmissionAppend: submission_id=#{submission_id}")
     submission = Submission.find(submission_id)
     submission.form.deactivate!('AuthorizationError')
diff --git a/app/mailers/application_mailer.rb b/app/mailers/application_mailer.rb
index 286b223..d84cb6e 100644
--- a/app/mailers/application_mailer.rb
+++ b/app/mailers/application_mailer.rb
@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
 class ApplicationMailer < ActionMailer::Base
   default from: 'from@example.com'
   layout 'mailer'
diff --git a/app/models/application_record.rb b/app/models/application_record.rb
index 10a4cba..71fbba5 100644
--- a/app/models/application_record.rb
+++ b/app/models/application_record.rb
@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
 class ApplicationRecord < ActiveRecord::Base
   self.abstract_class = true
 end
diff --git a/app/models/authentication.rb b/app/models/authentication.rb
index 6da1943..e74ac3f 100644
--- a/app/models/authentication.rb
+++ b/app/models/authentication.rb
@@ -1,7 +1,9 @@
+# frozen_string_literal: true
+
 class Authentication < ApplicationRecord
   belongs_to :user
 
-  scope :for, -> (provider) { where(provider: provider) }
+  scope :for, ->(provider) { where(provider: provider) }
 
   encrypts :access_token
   encrypts :refresh_token
@@ -10,19 +12,24 @@ class Authentication < ApplicationRecord
     expires_at <= Time.current
   end
 
+  def refresh_from(client_secret)
+    client_secret.refresh!
+    self.access_token = client_secret.access_token if client_secret.access_token.present?
+    self.refresh_token = client_secret.refresh_token if client_secret.refresh_token.present?
+    self.expires_at = Time.zone.at(client_secret.expires_at) if client_secret.expires_at.present?
+    save
+  end
+
   def google_authorization
     return nil unless provider == 'google'
+
     @google_authorization ||= CLIENT_SECRETS.to_authorization.tap do |c|
-      c.access_token = self.access_token
-      c.refresh_token = self.refresh_token
-      c.expires_at = self.expires_at
+      c.access_token = access_token
+      c.refresh_token = refresh_token
+      c.expires_at = expires_at
       if expires_at < 1.minute.from_now
-        c.refresh!
-        self.access_token = c.access_token if c.access_token.present?
-        self.refresh_token = c.refresh_token if c.refresh_token.present?
-        self.expires_at = Time.at(c.expires_at) if c.expires_at.present?
+        refresh_from(c)
       end
     end
   end
-
 end
diff --git a/app/models/form.rb b/app/models/form.rb
index 6ad6d99..b51c6f2 100644
--- a/app/models/form.rb
+++ b/app/models/form.rb
@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
 class Form < ApplicationRecord
   belongs_to :user
   has_many :submissions, dependent: :destroy
@@ -10,12 +12,12 @@ class Form < ApplicationRecord
   encrypts :airtable_api_key
   encrypts :airtable_app_key
 
-  validates_presence_of :title
-  validates_inclusion_of :backend_name, in: ['google_sheets', 'airtable']
+  validates :title, presence: true
+  validates :backend_name, inclusion: { in: %w[google_sheets airtable] }
   # Airtable validations
-  validates_presence_of :airtable_api_key, if: :airtable?
-  validates_presence_of :airtable_app_key, if: :airtable?
-  validates_presence_of :airtable_table, if: :airtable?
+  validates :airtable_api_key, presence: { if: :airtable? }
+  validates :airtable_app_key, presence: { if: :airtable? }
+  validates :airtable_table, presence: { if: :airtable? }
 
   # TODO: use counter_cache option on association
   def submissions_count
@@ -27,12 +29,10 @@ class Form < ApplicationRecord
   end
 
   def deactivate!(reason = nil)
-    self.user.deactivate!(reason)
+    user.deactivate!(reason)
   end
 
-  def active?
-    self.user.active?
-  end
+  delegate :active?, to: :user
 
   def airtable?
     backend_name == 'airtable'
diff --git a/app/models/submission.rb b/app/models/submission.rb
index 5a404d8..3b7426d 100644
--- a/app/models/submission.rb
+++ b/app/models/submission.rb
@@ -1,10 +1,12 @@
+# frozen_string_literal: true
+
 class Submission < ApplicationRecord
   belongs_to :form
   has_many_attached :files
 
   acts_as_sequenced scope: :form_id
 
-  validates_presence_of :data, if: :appended_at?
+  validates :data, presence: { if: :appended_at? }
 
   def process_data(submitted_data)
     processed_data = {}
@@ -12,7 +14,7 @@ class Submission < ApplicationRecord
       processed_data[key] = submission_value_for(value)
     end
     update_attribute(:data, processed_data)
-    SubmissionAppendJob.perform_later(self.id)
+    SubmissionAppendJob.perform_later(id)
   end
 
   def submission_value_for(value)
@@ -37,7 +39,8 @@ class Submission < ApplicationRecord
       attachment = ActiveStorage::Attachment.new(record: self, name: 'files', blob: create_one.blob)
       attachment.save
       # return the URL that we use to show in the Spreadsheet
-      Rails.application.routes.url_helpers.file_upload_url(form_id: form, submission_id: self, id: attachment.token, host: DEFAULT_HOST, filename: attachment.blob.filename)
+      Rails.application.routes.url_helpers.file_upload_url(form_id: form, submission_id: self, id: attachment.token,
+                                                           host: DEFAULT_HOST, filename: attachment.blob.filename)
     else
       value.to_s
     end
diff --git a/app/models/user.rb b/app/models/user.rb
index 094cf4f..f089218 100644
--- a/app/models/user.rb
+++ b/app/models/user.rb
@@ -1,9 +1,11 @@
+# frozen_string_literal: true
+
 class User < ApplicationRecord
   authenticates_with_sorcery!
   has_many :authentications, dependent: :destroy
   has_many :forms, dependent: :destroy
 
-  def deactivate!(reason = nil)
+  def deactivate!(_reason = nil)
     # currently we only use deactivate if we get an authentication exception appending data to a spreadsheet
     authentications.last&.update(expires_at: Time.current)
   end
diff --git a/app/views/forms/_form_example.html.erb b/app/views/forms/_form_example.html.erb
index fed070c..eb0b51f 100644
--- a/app/views/forms/_form_example.html.erb
+++ b/app/views/forms/_form_example.html.erb
@@ -6,6 +6,16 @@
       <%= text_field_tag header %>
     </p>
   <% end %>
+  <% if form.spreadsheet_headers.blank? %>
+    <p>
+      <label for="Name">Name</label>
+      <input type="text" name="Name" required>
+    </p>
+    <p>
+      <label for="Email">Email</label>
+      <input type="email" name="Email" required>
+    </p>
+  <% end %>
   ...
   <input type="submit" value="Submit">
 </form>
diff --git a/app/views/forms/_form_example_js.html.erb b/app/views/forms/_form_example_js.html.erb
index 15311f0..b291ddd 100644
--- a/app/views/forms/_form_example_js.html.erb
+++ b/app/views/forms/_form_example_js.html.erb
@@ -7,5 +7,4 @@
     </p>
   <% end %>
     ...
-  <input type="submit" value="Submit">
 </form>
diff --git a/app/views/forms/setup.html.erb b/app/views/forms/setup.html.erb
index aebf6fa..cbdd1b0 100644
--- a/app/views/forms/setup.html.erb
+++ b/app/views/forms/setup.html.erb
@@ -42,7 +42,7 @@
       <p>
         Please set your form action as in the example below. Make sure to use proper <code>name</code> attributes.
       <p>
-      <pre><code class="html">
+      <pre><code class="language-html">
 <%= html_escape_once render('form_example', form: @form) %>
       </code></pre>
 
@@ -50,12 +50,9 @@
       <p>
         Learn more about our <a href="https://www.notion.so/JavaScript-Library-442071548edd4cd1af9c7d8edb3d42cb">JavaScript library</a> and our <a href="https://www.notion.so/Tinyforms-API-7862355e22ce4bbead5de3b635cda55e">API</a> in your help section.
       </p>
-      <pre><code class="html">
+      <pre><code class="language-html">
 <%= html_escape_once render('form_example_js', form: @form) %>
       </code></pre>
-
-      <link rel="stylesheet" href="//cdn.jsdelivr.net/gh/highlightjs/cdn-release@10.0.0/build/styles/railscasts.min.css">
-      <script src="//cdn.jsdelivr.net/gh/highlightjs/cdn-release@10.0.0/build/highlight.min.js"></script>
     </div>
   </div>
 
diff --git a/app/views/forms/show.html.erb b/app/views/forms/show.html.erb
index df66cd8..e61786c 100644
--- a/app/views/forms/show.html.erb
+++ b/app/views/forms/show.html.erb
@@ -24,22 +24,23 @@
     <div class="columns is-centered">
       <div class="column is-two-thirds">
 
-        <h3 class="title">Setup your online form:</h3>
+        <h3 class="title">One more step:</h3>
         <p>
-          Your form submission URL: <code><%= submission_url(@form) %></code>
-        </p>
-        <p>
-          Set the <code>action</code> of your online form to this URL and make sure your fields have proper <code>name</code> attributes.
+          Set the <code>action</code> of your online form to <code><%= submission_url(@form) %></code> and make sure your fields have proper <code>name</code> attributes.
         </p>
         <h4 class="subtitle" style="margin-top:1em">Example:</h4>
-        <pre><code class="html">
+        <pre><code class="language-html">
 <%= html_escape_once render('form_example', form: @form) %>
         </code></pre>
-        <link rel="stylesheet" href="//cdn.jsdelivr.net/gh/highlightjs/cdn-release@10.0.0/build/styles/default.min.css">
-        <script src="//cdn.jsdelivr.net/gh/highlightjs/cdn-release@10.0.0/build/highlight.min.js"></script>
 
         <p>
-          Let us know if you need <%= link_to 'help', help_url %> - we also build the form for you!
+          If you prefer to submit the form using JavaScript/AJAX have a look at our <a href="https://www.notion.so/JavaScript-Library-442071548edd4cd1af9c7d8edb3d42cb">JavaScript library</a> and our <a href="https://www.notion.so/Tinyforms-API-7862355e22ce4bbead5de3b635cda55e">API</a>.
+        </p>
+        <p>
+          If you need help, <%= link_to "we're here!", help_url %>
+        </p>
+        <p style="margin-top:15px">
+          And if you do not want to deal with your form at all, have a look at our <%= link_to 'form building service', form_building_service_url %>.
         </p>
 
       </div>
diff --git a/app/views/sessions/new.html.erb b/app/views/sessions/new.html.erb
index 70ed4e8..f17ce3c 100644
--- a/app/views/sessions/new.html.erb
+++ b/app/views/sessions/new.html.erb
@@ -14,7 +14,7 @@
         <% end %>
         <hr>
         <p>
-          Simply login with your existing Google account.
+          Login with your existing Google account, no new credentials needed.
           <br>
           Do you need help? <%= link_to 'let us know', help_url %>.
         </p>
diff --git a/bin/bundle b/bin/bundle
index a71368e..4719508 100755
--- a/bin/bundle
+++ b/bin/bundle
@@ -8,46 +8,48 @@
 # this file is here to facilitate running it.
 #
 
-require "rubygems"
+require 'rubygems'
 
 m = Module.new do
   module_function
 
   def invoked_as_script?
-    File.expand_path($0) == File.expand_path(__FILE__)
+    File.expand_path($PROGRAM_NAME) == File.expand_path(__FILE__)
   end
 
   def env_var_version
-    ENV["BUNDLER_VERSION"]
+    ENV['BUNDLER_VERSION']
   end
 
   def cli_arg_version
     return unless invoked_as_script? # don't want to hijack other binstubs
-    return unless "update".start_with?(ARGV.first || " ") # must be running `bundle update`
+    unless 'update'.start_with?(ARGV.first || ' ')
+      return
+    end # must be running `bundle update`
+
     bundler_version = nil
     update_index = nil
     ARGV.each_with_index do |a, i|
-      if update_index && update_index.succ == i && a =~ Gem::Version::ANCHORED_VERSION_PATTERN
-        bundler_version = a
-      end
+      bundler_version = a if update_index && update_index.succ == i && a =~ Gem::Version::ANCHORED_VERSION_PATTERN
       next unless a =~ /\A--bundler(?:[= ](#{Gem::Version::VERSION_PATTERN}))?\z/
-      bundler_version = $1
+
+      bundler_version = Regexp.last_match(1)
       update_index = i
     end
     bundler_version
   end
 
   def gemfile
-    gemfile = ENV["BUNDLE_GEMFILE"]
+    gemfile = ENV['BUNDLE_GEMFILE']
     return gemfile if gemfile && !gemfile.empty?
 
-    File.expand_path("../../Gemfile", __FILE__)
+    File.expand_path('../Gemfile', __dir__)
   end
 
   def lockfile
     lockfile =
       case File.basename(gemfile)
-      when "gems.rb" then gemfile.sub(/\.rb$/, gemfile)
+      when 'gems.rb' then gemfile.sub(/\.rb$/, gemfile)
       else "#{gemfile}.lock"
       end
     File.expand_path(lockfile)
@@ -55,15 +57,17 @@ m = Module.new do
 
   def lockfile_version
     return unless File.file?(lockfile)
+
     lockfile_contents = File.read(lockfile)
     return unless lockfile_contents =~ /\n\nBUNDLED WITH\n\s{2,}(#{Gem::Version::VERSION_PATTERN})\n/
+
     Regexp.last_match(1)
   end
 
   def bundler_version
     @bundler_version ||=
       env_var_version || cli_arg_version ||
-        lockfile_version
+      lockfile_version
   end
 
   def bundler_requirement
@@ -73,28 +77,30 @@ m = Module.new do
 
     requirement = bundler_gem_version.approximate_recommendation
 
-    return requirement unless Gem::Version.new(Gem::VERSION) < Gem::Version.new("2.7.0")
+    return requirement unless Gem::Version.new(Gem::VERSION) < Gem::Version.new('2.7.0')
 
-    requirement += ".a" if bundler_gem_version.prerelease?
+    requirement += '.a' if bundler_gem_version.prerelease?
 
     requirement
   end
 
   def load_bundler!
-    ENV["BUNDLE_GEMFILE"] ||= gemfile
+    ENV['BUNDLE_GEMFILE'] ||= gemfile
 
     activate_bundler
   end
 
   def activate_bundler
     gem_error = activation_error_handling do
-      gem "bundler", bundler_requirement
+      gem 'bundler', bundler_requirement
     end
     return if gem_error.nil?
+
     require_error = activation_error_handling do
-      require "bundler/version"
+      require 'bundler/version'
     end
     return if require_error.nil? && Gem::Requirement.new(bundler_requirement).satisfied_by?(Gem::Version.new(Bundler::VERSION))
+
     warn "Activating bundler (#{bundler_requirement}) failed:\n#{gem_error.message}\n\nTo install the version of bundler this project requires, run `gem install bundler -v '#{bundler_requirement}'`"
     exit 42
   end
@@ -109,6 +115,4 @@ end
 
 m.load_bundler!
 
-if m.invoked_as_script?
-  load Gem.bin_path("bundler", "bundle")
-end
+load Gem.bin_path('bundler', 'bundle') if m.invoked_as_script?
diff --git a/bin/rails b/bin/rails
index 5badb2f..3504c3f 100755
--- a/bin/rails
+++ b/bin/rails
@@ -1,6 +1,8 @@
 #!/usr/bin/env ruby
+# frozen_string_literal: true
+
 begin
-  load File.expand_path('../spring', __FILE__)
+  load File.expand_path('spring', __dir__)
 rescue LoadError => e
   raise unless e.message.include?('spring')
 end
diff --git a/bin/rake b/bin/rake
index d87d5f5..1fe6cf0 100755
--- a/bin/rake
+++ b/bin/rake
@@ -1,6 +1,8 @@
 #!/usr/bin/env ruby
+# frozen_string_literal: true
+
 begin
-  load File.expand_path('../spring', __FILE__)
+  load File.expand_path('spring', __dir__)
 rescue LoadError => e
   raise unless e.message.include?('spring')
 end
diff --git a/bin/setup b/bin/setup
index 5853b5e..ac9f624 100755
--- a/bin/setup
+++ b/bin/setup
@@ -1,4 +1,6 @@
 #!/usr/bin/env ruby
+# frozen_string_literal: true
+
 require 'fileutils'
 
 # path to your application root.
diff --git a/bin/spring b/bin/spring
index d89ee49..1c6eabf 100755
--- a/bin/spring
+++ b/bin/spring
@@ -1,4 +1,5 @@
 #!/usr/bin/env ruby
+# frozen_string_literal: true
 
 # This file loads Spring without using Bundler, in order to be fast.
 # It gets overwritten when you run the `spring binstub` command.
diff --git a/bin/webpack b/bin/webpack
index 1031168..62114ba 100755
--- a/bin/webpack
+++ b/bin/webpack
@@ -1,18 +1,19 @@
 #!/usr/bin/env ruby
+# frozen_string_literal: true
 
-ENV["RAILS_ENV"] ||= ENV["RACK_ENV"] || "development"
-ENV["NODE_ENV"]  ||= "development"
+ENV['RAILS_ENV'] ||= ENV['RACK_ENV'] || 'development'
+ENV['NODE_ENV']  ||= 'development'
 
-require "pathname"
-ENV["BUNDLE_GEMFILE"] ||= File.expand_path("../../Gemfile",
-  Pathname.new(__FILE__).realpath)
+require 'pathname'
+ENV['BUNDLE_GEMFILE'] ||= File.expand_path('../../Gemfile',
+                                           Pathname.new(__FILE__).realpath)
 
-require "bundler/setup"
+require 'bundler/setup'
 
-require "webpacker"
-require "webpacker/webpack_runner"
+require 'webpacker'
+require 'webpacker/webpack_runner'
 
-APP_ROOT = File.expand_path("..", __dir__)
+APP_ROOT = File.expand_path('..', __dir__)
 Dir.chdir(APP_ROOT) do
   Webpacker::WebpackRunner.run(ARGV)
 end
diff --git a/bin/webpack-dev-server b/bin/webpack-dev-server
index dd96627..e4f41cc 100755
--- a/bin/webpack-dev-server
+++ b/bin/webpack-dev-server
@@ -1,18 +1,19 @@
 #!/usr/bin/env ruby
+# frozen_string_literal: true
 
-ENV["RAILS_ENV"] ||= ENV["RACK_ENV"] || "development"
-ENV["NODE_ENV"]  ||= "development"
+ENV['RAILS_ENV'] ||= ENV['RACK_ENV'] || 'development'
+ENV['NODE_ENV']  ||= 'development'
 
-require "pathname"
-ENV["BUNDLE_GEMFILE"] ||= File.expand_path("../../Gemfile",
-  Pathname.new(__FILE__).realpath)
+require 'pathname'
+ENV['BUNDLE_GEMFILE'] ||= File.expand_path('../../Gemfile',
+                                           Pathname.new(__FILE__).realpath)
 
-require "bundler/setup"
+require 'bundler/setup'
 
-require "webpacker"
-require "webpacker/dev_server_runner"
+require 'webpacker'
+require 'webpacker/dev_server_runner'
 
-APP_ROOT = File.expand_path("..", __dir__)
+APP_ROOT = File.expand_path('..', __dir__)
 Dir.chdir(APP_ROOT) do
   Webpacker::DevServerRunner.run(ARGV)
 end
diff --git a/bin/yarn b/bin/yarn
index 460dd56..4cac416 100755
--- a/bin/yarn
+++ b/bin/yarn
@@ -1,11 +1,11 @@
 #!/usr/bin/env ruby
+# frozen_string_literal: true
+
 APP_ROOT = File.expand_path('..', __dir__)
 Dir.chdir(APP_ROOT) do
-  begin
-    exec "yarnpkg", *ARGV
-  rescue Errno::ENOENT
-    $stderr.puts "Yarn executable was not detected in the system."
-    $stderr.puts "Download Yarn at https://yarnpkg.com/en/docs/install"
-    exit 1
-  end
+  exec 'yarnpkg', *ARGV
+rescue Errno::ENOENT
+  warn 'Yarn executable was not detected in the system.'
+  warn 'Download Yarn at https://yarnpkg.com/en/docs/install'
+  exit 1
 end
diff --git a/config.ru b/config.ru
index f7ba0b5..842bccc 100644
--- a/config.ru
+++ b/config.ru
@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
 # This file is used by Rack-based servers to start the application.
 
 require_relative 'config/environment'
diff --git a/config/application.rb b/config/application.rb
index ffe45c8..2fb51f1 100644
--- a/config/application.rb
+++ b/config/application.rb
@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
 require_relative 'boot'
 
 require 'rails/all'
@@ -29,7 +31,7 @@ module Tinyform
     config.middleware.insert_before 0, Rack::Cors do
       allow do
         origins '*'
-        resource '/s/*', headers: :any, methods: [:post, :put, :options]
+        resource '/s/*', headers: :any, methods: %i[post put options]
       end
     end
   end
diff --git a/config/boot.rb b/config/boot.rb
index b9e460c..c04863f 100644
--- a/config/boot.rb
+++ b/config/boot.rb
@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
 ENV['BUNDLE_GEMFILE'] ||= File.expand_path('../Gemfile', __dir__)
 
 require 'bundler/setup' # Set up gems listed in the Gemfile.
diff --git a/config/environment.rb b/config/environment.rb
index 426333b..d5abe55 100644
--- a/config/environment.rb
+++ b/config/environment.rb
@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
 # Load the Rails application.
 require_relative 'application'
 
diff --git a/config/environments/development.rb b/config/environments/development.rb
index 66df51f..e8fdb5a 100644
--- a/config/environments/development.rb
+++ b/config/environments/development.rb
@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
 Rails.application.configure do
   # Settings specified here will take precedence over those in config/application.rb.
 
@@ -14,7 +16,7 @@ Rails.application.configure do
 
   # Enable/disable caching. By default caching is disabled.
   # Run rails dev:cache to toggle caching.
-  if Rails.root.join('tmp', 'caching-dev.txt').exist?
+  if Rails.root.join('tmp/caching-dev.txt').exist?
     config.action_controller.perform_caching = true
     config.action_controller.enable_fragment_cache_logging = true
 
diff --git a/config/environments/production.rb b/config/environments/production.rb
index 51f2525..af5c9a1 100644
--- a/config/environments/production.rb
+++ b/config/environments/production.rb
@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
 Rails.application.configure do
   # Settings specified here will take precedence over those in config/application.rb.
 
@@ -51,7 +53,7 @@ Rails.application.configure do
   config.log_level = :info
 
   # Prepend all log lines with the following tags.
-  config.log_tags = [ :request_id ]
+  config.log_tags = [:request_id]
 
   # Use a different cache store in production.
   # config.cache_store = :mem_cache_store
@@ -80,7 +82,7 @@ Rails.application.configure do
   # require 'syslog/logger'
   # config.logger = ActiveSupport::TaggedLogging.new(Syslog::Logger.new 'app-name')
 
-  if ENV["RAILS_LOG_TO_STDOUT"].present?
+  if ENV['RAILS_LOG_TO_STDOUT'].present?
     logger           = ActiveSupport::Logger.new(STDOUT)
     logger.formatter = config.log_formatter
     config.logger    = ActiveSupport::TaggedLogging.new(logger)
diff --git a/config/environments/test.rb b/config/environments/test.rb
index 1d62e91..e5cbfe5 100644
--- a/config/environments/test.rb
+++ b/config/environments/test.rb
@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
 # The test environment is used exclusively to run your application's
 # test suite. You never need to work with it otherwise. Remember that
 # your test database is "scratch space" for the test suite and is wiped
diff --git a/config/initializers/application_controller_renderer.rb b/config/initializers/application_controller_renderer.rb
index 89d2efa..f4556db 100644
--- a/config/initializers/application_controller_renderer.rb
+++ b/config/initializers/application_controller_renderer.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: true
 # Be sure to restart your server when you modify this file.
 
 # ActiveSupport::Reloader.to_prepare do
diff --git a/config/initializers/assets.rb b/config/initializers/assets.rb
index 4b828e8..a9b0d0f 100644
--- a/config/initializers/assets.rb
+++ b/config/initializers/assets.rb
@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
 # Be sure to restart your server when you modify this file.
 
 # Version of your assets, change this if you want to expire all your assets.
diff --git a/config/initializers/attachment_tokens.rb b/config/initializers/attachment_tokens.rb
index a73e466..53bd4cd 100644
--- a/config/initializers/attachment_tokens.rb
+++ b/config/initializers/attachment_tokens.rb
@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
 Rails.configuration.to_prepare do
   ActiveStorage::Attachment.send(:has_secure_token)
 end
diff --git a/config/initializers/backtrace_silencers.rb b/config/initializers/backtrace_silencers.rb
index 59385cd..d0f0d3b 100644
--- a/config/initializers/backtrace_silencers.rb
+++ b/config/initializers/backtrace_silencers.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: true
 # Be sure to restart your server when you modify this file.
 
 # You can add backtrace silencers for libraries that you're using but don't wish to see in your backtraces.
diff --git a/config/initializers/content_security_policy.rb b/config/initializers/content_security_policy.rb
index 35d0f26..f3bcce5 100644
--- a/config/initializers/content_security_policy.rb
+++ b/config/initializers/content_security_policy.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: true
 # Be sure to restart your server when you modify this file.
 
 # Define an application-wide content security policy
diff --git a/config/initializers/cookies_serializer.rb b/config/initializers/cookies_serializer.rb
index 5a6a32d..ee8dff9 100644
--- a/config/initializers/cookies_serializer.rb
+++ b/config/initializers/cookies_serializer.rb
@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
 # Be sure to restart your server when you modify this file.
 
 # Specify a serializer for the signed and encrypted cookie jars.
diff --git a/config/initializers/demo.rb b/config/initializers/demo.rb
index 4947248..de6fb3b 100644
--- a/config/initializers/demo.rb
+++ b/config/initializers/demo.rb
@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
 GOOGLE_DEMO_FORM = Form.find_by(id: ENV['GOOGLE_DEMO_FORM_ID'])
 AIRTABLE_DEMO_FORM = Form.find_by(id: ENV['AIRTABLE_DEMO_FORM_ID'])
 AIRTABLE_DEMO_EMBED_URL = ENV['AIRTABLE_DEMO_EMBED_URL']
diff --git a/config/initializers/filter_parameter_logging.rb b/config/initializers/filter_parameter_logging.rb
index 4a994e1..7a4f47b 100644
--- a/config/initializers/filter_parameter_logging.rb
+++ b/config/initializers/filter_parameter_logging.rb
@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
 # Be sure to restart your server when you modify this file.
 
 # Configure sensitive parameters which will be filtered from the log file.
diff --git a/config/initializers/google.rb b/config/initializers/google.rb
index 5acb04c..6b15c5e 100644
--- a/config/initializers/google.rb
+++ b/config/initializers/google.rb
@@ -1,13 +1,15 @@
+# frozen_string_literal: true
+
 require 'google/api_client/client_secrets'
 require 'google/apis'
 
 secrets_options = {
-  "client_id" => ENV['GOOGLE_CLIENT_ID'],
-  "project_id" => ENV['GOOGLE_PROJECT_ID'],
-  "client_secret" => ENV['GOOGLE_CLIENT_SECRET'],
-  "auth_uri" => "https://accounts.google.com/o/oauth2/auth",
-  "token_uri" => "https://oauth2.googleapis.com/token",
-  "auth_provider_x509_cert_url" => "https://www.googleapis.com/oauth2/v1/certs"
+  'client_id' => ENV['GOOGLE_CLIENT_ID'],
+  'project_id' => ENV['GOOGLE_PROJECT_ID'],
+  'client_secret' => ENV['GOOGLE_CLIENT_SECRET'],
+  'auth_uri' => 'https://accounts.google.com/o/oauth2/auth',
+  'token_uri' => 'https://oauth2.googleapis.com/token',
+  'auth_provider_x509_cert_url' => 'https://www.googleapis.com/oauth2/v1/certs'
 }
-CLIENT_SECRETS = Google::APIClient::ClientSecrets.new("web" => secrets_options)
+CLIENT_SECRETS = Google::APIClient::ClientSecrets.new('web' => secrets_options)
 Google::Apis.logger = ::Rails.logger
diff --git a/config/initializers/host.rb b/config/initializers/host.rb
index e4d2eaa..b27031c 100644
--- a/config/initializers/host.rb
+++ b/config/initializers/host.rb
@@ -1 +1,3 @@
+# frozen_string_literal: true
+
 DEFAULT_HOST = ENV['DEFAULT_HOST'] || 'localhost:3000'
diff --git a/config/initializers/inflections.rb b/config/initializers/inflections.rb
index ac033bf..aa7435f 100644
--- a/config/initializers/inflections.rb
+++ b/config/initializers/inflections.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: true
 # Be sure to restart your server when you modify this file.
 
 # Add new inflection rules using the following format. Inflections
diff --git a/config/initializers/mime_types.rb b/config/initializers/mime_types.rb
index dc18996..6e1d16f 100644
--- a/config/initializers/mime_types.rb
+++ b/config/initializers/mime_types.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: true
 # Be sure to restart your server when you modify this file.
 
 # Add new mime types for use in respond_to blocks:
diff --git a/config/initializers/sorcery.rb b/config/initializers/sorcery.rb
index 3e76ca2..a03a61f 100644
--- a/config/initializers/sorcery.rb
+++ b/config/initializers/sorcery.rb
@@ -1,10 +1,12 @@
+# frozen_string_literal: true
+
 # The first thing you need to configure is which modules you need in your app.
 # The default is nothing which will include only core features (password encryption, login/logout).
 #
 # Available submodules are: :user_activation, :http_basic_auth, :remember_me,
 # :reset_password, :session_timeout, :brute_force_protection, :activity_logging,
 # :magic_login, :external
-Rails.application.config.sorcery.submodules = [:reset_password, :external, :magic_login]
+Rails.application.config.sorcery.submodules = %i[reset_password external magic_login]
 
 # Here you can configure each submodule's features.
 Rails.application.config.sorcery.configure do |config|
@@ -152,9 +154,9 @@ Rails.application.config.sorcery.configure do |config|
   #
   config.google.key = ENV['GOOGLE_CLIENT_ID']
   config.google.secret = ENV['GOOGLE_CLIENT_SECRET']
-  config.google.callback_url = (ENV['GOOGLE_AUTH_CALLBACK_URL'] || "http://localhost:3000/oauth/callback?provider=google")
-  config.google.user_info_mapping = {:email => "email", :name => "name", :google_id => "id"}
-  config.google.scope = "https://www.googleapis.com/auth/userinfo.email https://www.googleapis.com/auth/userinfo.profile https://www.googleapis.com/auth/spreadsheets"
+  config.google.callback_url = (ENV['GOOGLE_AUTH_CALLBACK_URL'] || 'http://localhost:3000/oauth/callback?provider=google')
+  config.google.user_info_mapping = { email: 'email', name: 'name', google_id: 'id' }
+  config.google.scope = 'https://www.googleapis.com/auth/userinfo.email https://www.googleapis.com/auth/userinfo.profile https://www.googleapis.com/auth/spreadsheets'
   config.google.auth_url = '/o/oauth2/auth?access_type=offline&include_granted_scopes=true'
   #
   # For Microsoft Graph, the key will be your App ID, and the secret will be your app password/public key.
@@ -407,7 +409,7 @@ Rails.application.config.sorcery.configure do |config|
     #
     # user.magic_login_token_expires_at_attribute_name =
 
-    # When was magic login email sent — used for hammering protection.
+    # When was magic login email sent - for hammering protection.
     # Default: `:magic_login_email_sent_at`
     #
     # user.magic_login_email_sent_at_attribute_name =
@@ -528,5 +530,5 @@ Rails.application.config.sorcery.configure do |config|
 
   # This line must come after the 'user config' block.
   # Define which model authenticates with sorcery.
-  config.user_class = "User"
+  config.user_class = 'User'
 end
diff --git a/config/initializers/wrap_parameters.rb b/config/initializers/wrap_parameters.rb
index bbfc396..2f3c0db 100644
--- a/config/initializers/wrap_parameters.rb
+++ b/config/initializers/wrap_parameters.rb
@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
 # Be sure to restart your server when you modify this file.
 
 # This file contains settings for ActionController::ParamsWrapper which
diff --git a/config/puma.rb b/config/puma.rb
index 5ed4437..6d84069 100644
--- a/config/puma.rb
+++ b/config/puma.rb
@@ -1,23 +1,25 @@
+# frozen_string_literal: true
+
 # Puma can serve each request in a thread from an internal thread pool.
 # The `threads` method setting takes two numbers: a minimum and maximum.
 # Any libraries that use thread pools should be configured to match
 # the maximum value specified for Puma. Default is set to 5 threads for minimum
 # and maximum; this matches the default thread size of Active Record.
 #
-max_threads_count = ENV.fetch("RAILS_MAX_THREADS") { 5 }
-min_threads_count = ENV.fetch("RAILS_MIN_THREADS") { max_threads_count }
+max_threads_count = ENV.fetch('RAILS_MAX_THREADS') { 5 }
+min_threads_count = ENV.fetch('RAILS_MIN_THREADS') { max_threads_count }
 threads min_threads_count, max_threads_count
 
 # Specifies the `port` that Puma will listen on to receive requests; default is 3000.
 #
-port        ENV.fetch("PORT") { 3000 }
+port        ENV.fetch('PORT') { 3000 }
 
 # Specifies the `environment` that Puma will run in.
 #
-environment ENV.fetch("RAILS_ENV") { "development" }
+environment ENV.fetch('RAILS_ENV') { 'development' }
 
 # Specifies the `pidfile` that Puma will use.
-pidfile ENV.fetch("PIDFILE") { "tmp/pids/server.pid" }
+pidfile ENV.fetch('PIDFILE') { 'tmp/pids/server.pid' }
 
 # Specifies the number of `workers` to boot in clustered mode.
 # Workers are forked web server processes. If using threads and workers together
diff --git a/config/routes.rb b/config/routes.rb
index 832d680..0278048 100644
--- a/config/routes.rb
+++ b/config/routes.rb
@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
 Rails.application.routes.draw do
   # For details on the DSL available within this file, see https://guides.rubyonrails.org/routing.html
 
@@ -11,25 +13,25 @@ Rails.application.routes.draw do
   # short link for submission file uploads
   # we add the filename as part of the URL which allows e.g. Airtable to identify and name the file properly
   # the constraint makes sure that a . (dot) can be in the filename. e.g. cat.jpg
-  get '/s/:form_id/:submission_id/:id(/:filename)' => 'file_uploads#show', as: :file_upload, constraints: { filename: /[^\/]+/ }
+  get '/s/:form_id/:submission_id/:id(/:filename)' => 'file_uploads#show', :as => :file_upload, :constraints => { filename: %r{[^/]+} }
 
   # form post url to save new submissions
-  post '/s/:form_id' => 'submissions#create', as: :submission
+  post '/s/:form_id' => 'submissions#create', :as => :submission
   # short URL for form page
-  get '/s/:id/form' => 'forms#form', as: :form_submitter
+  get '/s/:id/form' => 'forms#form', :as => :form_submitter
 
   get 'oauth/callback', to: 'oauths#callback'
   get 'oauth/:provider', to: 'oauths#oauth', as: :auth_at_provider
 
-  get '/signup' => 'sessions#new', as: :signup # TODO: add proper signup page
-  get '/login' => 'sessions#new', as: :login
-  get '/logout' => 'sessions#destroy', as: :logout
-  get '/auth' => 'sessions#auth', as: :auth
+  get '/signup' => 'sessions#new', :as => :signup # TODO: add proper signup page
+  get '/login' => 'sessions#new', :as => :login
+  get '/logout' => 'sessions#destroy', :as => :logout
+  get '/auth' => 'sessions#auth', :as => :auth
 
-  get '/demo(/:backend)' => 'home#demo', as: :demo
-  get '/contact' => 'home#contact', as: :contact
+  get '/demo(/:backend)' => 'home#demo', :as => :demo
+  get '/contact' => 'home#contact', :as => :contact
   get '/help', to: redirect('https://www.notion.so/Tinyforms-Help-Center-04f13b5908bc46cfb4283079a3cb1149')
-
+  get '/form-building-service', to: redirect('https://www.notion.so/Tinyforms-Help-Center-04f13b5908bc46cfb4283079a3cb1149')
 
   root 'home#index'
 end
diff --git a/config/spring.rb b/config/spring.rb
index db5bf13..93cd0ff 100644
--- a/config/spring.rb
+++ b/config/spring.rb
@@ -1,6 +1,8 @@
+# frozen_string_literal: true
+
 Spring.watch(
-  ".ruby-version",
-  ".rbenv-vars",
-  "tmp/restart.txt",
-  "tmp/caching-dev.txt"
+  '.ruby-version',
+  '.rbenv-vars',
+  'tmp/restart.txt',
+  'tmp/caching-dev.txt'
 )
diff --git a/db/migrate/20200405112929_create_authentications.rb b/db/migrate/20200405112929_create_authentications.rb
index 09c5add..b09607a 100644
--- a/db/migrate/20200405112929_create_authentications.rb
+++ b/db/migrate/20200405112929_create_authentications.rb
@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
 class CreateAuthentications < ActiveRecord::Migration[6.0]
   def change
     create_table :authentications do |t|
diff --git a/db/migrate/20200405114101_create_users.rb b/db/migrate/20200405114101_create_users.rb
index b3d94b7..92725df 100644
--- a/db/migrate/20200405114101_create_users.rb
+++ b/db/migrate/20200405114101_create_users.rb
@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
 class CreateUsers < ActiveRecord::Migration[6.0]
   def change
     create_table :users do |t|
diff --git a/db/migrate/20200405121558_create_forms.rb b/db/migrate/20200405121558_create_forms.rb
index 94457a6..553ac2d 100644
--- a/db/migrate/20200405121558_create_forms.rb
+++ b/db/migrate/20200405121558_create_forms.rb
@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
 class CreateForms < ActiveRecord::Migration[6.0]
   def change
     create_table :forms do |t|
@@ -7,7 +9,6 @@ class CreateForms < ActiveRecord::Migration[6.0]
       t.string :token
       t.string :thank_you_url
 
-
       t.timestamps
     end
   end
diff --git a/db/migrate/20200405161905_create_submissions.rb b/db/migrate/20200405161905_create_submissions.rb
index 6c06b3c..21fd596 100644
--- a/db/migrate/20200405161905_create_submissions.rb
+++ b/db/migrate/20200405161905_create_submissions.rb
@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
 class CreateSubmissions < ActiveRecord::Migration[6.0]
   def change
     create_table :submissions do |t|
diff --git a/db/migrate/20200406221804_create_active_storage_tables.active_storage.rb b/db/migrate/20200406221804_create_active_storage_tables.active_storage.rb
index 0b2ce25..98317c9 100644
--- a/db/migrate/20200406221804_create_active_storage_tables.active_storage.rb
+++ b/db/migrate/20200406221804_create_active_storage_tables.active_storage.rb
@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
 # This migration comes from active_storage (originally 20170806125915)
 class CreateActiveStorageTables < ActiveRecord::Migration[5.2]
   def change
@@ -10,7 +12,7 @@ class CreateActiveStorageTables < ActiveRecord::Migration[5.2]
       t.string   :checksum,   null: false
       t.datetime :created_at, null: false
 
-      t.index [ :key ], unique: true
+      t.index [:key], unique: true
     end
 
     create_table :active_storage_attachments do |t|
@@ -20,7 +22,7 @@ class CreateActiveStorageTables < ActiveRecord::Migration[5.2]
 
       t.datetime :created_at, null: false
 
-      t.index [ :record_type, :record_id, :name, :blob_id ], name: "index_active_storage_attachments_uniqueness", unique: true
+      t.index %i[record_type record_id name blob_id], name: 'index_active_storage_attachments_uniqueness', unique: true
       t.foreign_key :active_storage_blobs, column: :blob_id
     end
   end
diff --git a/db/migrate/20200408212150_add_lockbox_columns.rb b/db/migrate/20200408212150_add_lockbox_columns.rb
index 05d0e49..e20b84b 100644
--- a/db/migrate/20200408212150_add_lockbox_columns.rb
+++ b/db/migrate/20200408212150_add_lockbox_columns.rb
@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
 class AddLockboxColumns < ActiveRecord::Migration[6.0]
   def change
     add_column :authentications, :access_token_ciphertext, :text
diff --git a/db/migrate/20200409001610_add_metadata_to_submissions.rb b/db/migrate/20200409001610_add_metadata_to_submissions.rb
index cb9faf4..40ae7e2 100644
--- a/db/migrate/20200409001610_add_metadata_to_submissions.rb
+++ b/db/migrate/20200409001610_add_metadata_to_submissions.rb
@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
 class AddMetadataToSubmissions < ActiveRecord::Migration[6.0]
   def change
     add_column :submissions, :remote_ip, :string
diff --git a/db/migrate/20200412165834_add_sequential_id_to_submissions.rb b/db/migrate/20200412165834_add_sequential_id_to_submissions.rb
index 5b9c899..291d945 100644
--- a/db/migrate/20200412165834_add_sequential_id_to_submissions.rb
+++ b/db/migrate/20200412165834_add_sequential_id_to_submissions.rb
@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
 class AddSequentialIdToSubmissions < ActiveRecord::Migration[6.0]
   def change
     add_column :submissions, :sequential_id, :integer
diff --git a/db/migrate/20200412214304_add_token_to_attachments.rb b/db/migrate/20200412214304_add_token_to_attachments.rb
index 76922bc..dd2d9dc 100644
--- a/db/migrate/20200412214304_add_token_to_attachments.rb
+++ b/db/migrate/20200412214304_add_token_to_attachments.rb
@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
 class AddTokenToAttachments < ActiveRecord::Migration[6.0]
   def change
     add_column :active_storage_attachments, :token, :string
diff --git a/db/migrate/20200413101920_sorcery_core.rb b/db/migrate/20200413101920_sorcery_core.rb
index 9100c7e..1c983a4 100644
--- a/db/migrate/20200413101920_sorcery_core.rb
+++ b/db/migrate/20200413101920_sorcery_core.rb
@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
 class SorceryCore < ActiveRecord::Migration[6.0]
   def change
     add_column :users, :crypted_password, :string
diff --git a/db/migrate/20200413152532_add_airtable_support.rb b/db/migrate/20200413152532_add_airtable_support.rb
index a5465dc..05ba84b 100644
--- a/db/migrate/20200413152532_add_airtable_support.rb
+++ b/db/migrate/20200413152532_add_airtable_support.rb
@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
 class AddAirtableSupport < ActiveRecord::Migration[6.0]
   def change
     add_column :forms, :airtable_app_key_ciphertext, :string
diff --git a/db/schema.rb b/db/schema.rb
index 0c9af99..3f72713 100644
--- a/db/schema.rb
+++ b/db/schema.rb
@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
 # This file is auto-generated from the current state of the database. Instead
 # of editing this file, please use the migrations feature of Active Record to
 # incrementally modify your database, and then regenerate this schema definition.
@@ -10,84 +12,83 @@
 #
 # It's strongly recommended that you check this file into your version control system.
 
-ActiveRecord::Schema.define(version: 2020_04_13_152532) do
-
+ActiveRecord::Schema.define(version: 20_200_413_152_532) do
   # These are extensions that must be enabled in order to support this database
-  enable_extension "plpgsql"
+  enable_extension 'plpgsql'
 
-  create_table "active_storage_attachments", force: :cascade do |t|
-    t.string "name", null: false
-    t.string "record_type", null: false
-    t.bigint "record_id", null: false
-    t.bigint "blob_id", null: false
-    t.datetime "created_at", null: false
-    t.string "token"
-    t.index ["blob_id"], name: "index_active_storage_attachments_on_blob_id"
-    t.index ["record_type", "record_id", "name", "blob_id"], name: "index_active_storage_attachments_uniqueness", unique: true
-    t.index ["token"], name: "index_active_storage_attachments_on_token", unique: true
+  create_table 'active_storage_attachments', force: :cascade do |t|
+    t.string 'name', null: false
+    t.string 'record_type', null: false
+    t.bigint 'record_id', null: false
+    t.bigint 'blob_id', null: false
+    t.datetime 'created_at', null: false
+    t.string 'token'
+    t.index ['blob_id'], name: 'index_active_storage_attachments_on_blob_id'
+    t.index %w[record_type record_id name blob_id], name: 'index_active_storage_attachments_uniqueness', unique: true
+    t.index ['token'], name: 'index_active_storage_attachments_on_token', unique: true
   end
 
-  create_table "active_storage_blobs", force: :cascade do |t|
-    t.string "key", null: false
-    t.string "filename", null: false
-    t.string "content_type"
-    t.text "metadata"
-    t.bigint "byte_size", null: false
-    t.string "checksum", null: false
-    t.datetime "created_at", null: false
-    t.index ["key"], name: "index_active_storage_blobs_on_key", unique: true
+  create_table 'active_storage_blobs', force: :cascade do |t|
+    t.string 'key', null: false
+    t.string 'filename', null: false
+    t.string 'content_type'
+    t.text 'metadata'
+    t.bigint 'byte_size', null: false
+    t.string 'checksum', null: false
+    t.datetime 'created_at', null: false
+    t.index ['key'], name: 'index_active_storage_blobs_on_key', unique: true
   end
 
-  create_table "authentications", force: :cascade do |t|
-    t.integer "user_id"
-    t.datetime "expires_at"
-    t.datetime "created_at", precision: 6, null: false
-    t.datetime "updated_at", precision: 6, null: false
-    t.text "access_token_ciphertext"
-    t.text "refresh_token_ciphertext"
-    t.string "provider"
-    t.string "uid"
+  create_table 'authentications', force: :cascade do |t|
+    t.integer 'user_id'
+    t.datetime 'expires_at'
+    t.datetime 'created_at', precision: 6, null: false
+    t.datetime 'updated_at', precision: 6, null: false
+    t.text 'access_token_ciphertext'
+    t.text 'refresh_token_ciphertext'
+    t.string 'provider'
+    t.string 'uid'
   end
 
-  create_table "forms", force: :cascade do |t|
-    t.integer "user_id"
-    t.string "google_spreadsheet_id"
-    t.string "title"
-    t.string "token"
-    t.string "thank_you_url"
-    t.datetime "created_at", precision: 6, null: false
-    t.datetime "updated_at", precision: 6, null: false
-    t.string "airtable_app_key_ciphertext"
-    t.string "airtable_api_key_ciphertext"
-    t.string "airtable_table"
-    t.string "backend_name"
+  create_table 'forms', force: :cascade do |t|
+    t.integer 'user_id'
+    t.string 'google_spreadsheet_id'
+    t.string 'title'
+    t.string 'token'
+    t.string 'thank_you_url'
+    t.datetime 'created_at', precision: 6, null: false
+    t.datetime 'updated_at', precision: 6, null: false
+    t.string 'airtable_app_key_ciphertext'
+    t.string 'airtable_api_key_ciphertext'
+    t.string 'airtable_table'
+    t.string 'backend_name'
   end
 
-  create_table "submissions", force: :cascade do |t|
-    t.integer "form_id"
-    t.json "data", default: {}
-    t.datetime "appended_at"
-    t.datetime "created_at", precision: 6, null: false
-    t.datetime "updated_at", precision: 6, null: false
-    t.string "remote_ip"
-    t.string "referrer"
-    t.integer "sequential_id"
+  create_table 'submissions', force: :cascade do |t|
+    t.integer 'form_id'
+    t.json 'data', default: {}
+    t.datetime 'appended_at'
+    t.datetime 'created_at', precision: 6, null: false
+    t.datetime 'updated_at', precision: 6, null: false
+    t.string 'remote_ip'
+    t.string 'referrer'
+    t.integer 'sequential_id'
   end
 
-  create_table "users", force: :cascade do |t|
-    t.string "email"
-    t.string "name"
-    t.string "google_id"
-    t.datetime "created_at", precision: 6, null: false
-    t.datetime "updated_at", precision: 6, null: false
-    t.string "crypted_password"
-    t.string "salt"
-    t.string "magic_login_token"
-    t.datetime "magic_login_token_expires_at"
-    t.datetime "magic_login_email_sent_at"
-    t.index ["email"], name: "index_users_on_email", unique: true
-    t.index ["magic_login_token"], name: "index_users_on_magic_login_token"
+  create_table 'users', force: :cascade do |t|
+    t.string 'email'
+    t.string 'name'
+    t.string 'google_id'
+    t.datetime 'created_at', precision: 6, null: false
+    t.datetime 'updated_at', precision: 6, null: false
+    t.string 'crypted_password'
+    t.string 'salt'
+    t.string 'magic_login_token'
+    t.datetime 'magic_login_token_expires_at'
+    t.datetime 'magic_login_email_sent_at'
+    t.index ['email'], name: 'index_users_on_email', unique: true
+    t.index ['magic_login_token'], name: 'index_users_on_magic_login_token'
   end
 
-  add_foreign_key "active_storage_attachments", "active_storage_blobs", column: "blob_id"
+  add_foreign_key 'active_storage_attachments', 'active_storage_blobs', column: 'blob_id'
 end
diff --git a/db/seeds.rb b/db/seeds.rb
index 1beea2a..8744e3c 100644
--- a/db/seeds.rb
+++ b/db/seeds.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: true
 # This file should contain all the record creation needed to seed the database with its default values.
 # The data can then be loaded with the rails db:seed command (or created alongside the database with db:setup).
 #
diff --git a/lib/spreadsheet_backends/airtable.rb b/lib/spreadsheet_backends/airtable.rb
index 047a8f8..1b0d244 100644
--- a/lib/spreadsheet_backends/airtable.rb
+++ b/lib/spreadsheet_backends/airtable.rb
@@ -1,7 +1,8 @@
+# frozen_string_literal: true
+
 require 'airrecord'
 module SpreadsheetBackends
   class Airtable
-
     attr_accessor :form, :user
 
     def initialize(form)
@@ -16,8 +17,8 @@ module SpreadsheetBackends
     def append(data)
       result = table.create(data, typecast: true)
       result.id.present?
-    rescue Airrecord::Error => e
-      return false
+    rescue Airrecord::Error
+      false
     end
 
     def create
diff --git a/lib/spreadsheet_backends/google_sheets.rb b/lib/spreadsheet_backends/google_sheets.rb
index d2a6ab3..d5f92d1 100644
--- a/lib/spreadsheet_backends/google_sheets.rb
+++ b/lib/spreadsheet_backends/google_sheets.rb
@@ -1,8 +1,10 @@
+# frozen_string_literal: true
+
 require 'google/apis/sheets_v4'
 module SpreadsheetBackends
   class GoogleSheets
     # Hash to translate an index to a A1 notation. e.g. 1 => 'B', 27 => 'AA'
-    COLUMN_INDEX_TO_LETTER = Hash.new {|hash,key| hash[key] = hash[key - 1].next }.merge({0 => "A"})
+    COLUMN_INDEX_TO_LETTER = Hash.new { |hash, key| hash[key] = hash[key - 1].next }.merge({ 0 => 'A' })
 
     attr_accessor :form, :user
 
@@ -30,17 +32,17 @@ module SpreadsheetBackends
     def create
       sheets = Google::Apis::SheetsV4::SheetsService.new
       sheets.authorization = user.google_authorization
-      create_object = Google::Apis::SheetsV4::Spreadsheet.new(properties: { title: form.title})
+      create_object = Google::Apis::SheetsV4::Spreadsheet.new(properties: { title: form.title })
       spreadsheet = sheets.create_spreadsheet(create_object)
       form.update(google_spreadsheet_id: spreadsheet.spreadsheet_id)
     end
 
     def headers
       @headers ||= begin
-                     values = spreadsheet_service.get_spreadsheet_values(form.google_spreadsheet_id, 'A1:An').values
+                           values = spreadsheet_service.get_spreadsheet_values(form.google_spreadsheet_id, 'A1:An').values
                            # if there are no headers yet, return an empty array
                            if values
-                            values[0].map(&:strip)
+                             values[0].map(&:strip)
                            else
                              []
                            end
@@ -66,6 +68,5 @@ module SpreadsheetBackends
       spreadsheet_service.update_spreadsheet_value(form.google_spreadsheet_id, range, value_range, value_input_option: 'USER_ENTERED')
       @headers = nil # reset header values to refresh memoization on next access
     end
-
   end
 end