Update mastodon cookbook for 1.4.1

There is a strange issue with assets precompilation. I have found a
workaround but it looks like a bug in application_ruby (in production I
fixed it manually)

site-cookbooks/kosmos-mastodon/recipes/default.rb

@@ -41,13 +41,22 @@ user "mastodon" do
   home mastodon_path
 end
 
-package %w(imagemagick ffmpeg libxml2-dev libxslt1-dev file git curl)
-node_package %w(yarn)
+package %w(imagemagick ffmpeg libxml2-dev libxslt1-dev file git curl pkg-config libprotobuf-dev protobuf-compiler)
+node_package %w(yarn) # Used by Rails' assets pipeline
+
+ruby_version = "2.4.1"
 
 application mastodon_path do
   owner "mastodon"
   group "mastodon"
 
+  environment "HOME" => mastodon_path
+
+  ruby_runtime ruby_version do
+    provider :ruby_build
+    version ruby_version
+  end
+
   git do
     user "mastodon"
     group "mastodon"
@@ -83,24 +92,27 @@ application mastodon_path do
     recursive true
   end
 
-  ruby_runtime do
-    provider :ruby_build
-    version '2.4.1'
-  end
-
   bundle_install do
     user "mastodon"
     deployment true
     without %w(development test)
   end
 
-  npm_install do
-    user "mastodon"
-  end
-
   rails do
     migrate true
     rails_env "production"
+    precompile_assets false # buggy, done manually below
+  end
+
+  # This is the only way I could find that makes compiling the assets
+  # successfully for now. application_ruby's precompile_assets crashes because
+  # it cannot find the bundled gems
+  execute 'rake assets:precompile' do
+    environment "RAILS_ENV" => "production", "HOME" => mastodon_path
+    user "mastodon"
+    group "mastodon"
+    cwd mastodon_path
+    command "PATH=\"/opt/ruby_build/builds/#{ruby_version}/bin:$PATH\" /opt/ruby_build/builds/#{ruby_version}/bin/bundle exec rake assets:precompile"
   end
 
   execute "systemctl daemon-reload" do
@@ -115,9 +127,9 @@ application mastodon_path do
     variables user: user,
               app_dir: mastodon_path,
               port: node["kosmos-mastodon"]["puma_port"],
-              bundle_path: '/opt/ruby_build/builds/opt/mastodon/bin/bundle'
+              bundle_path: "/opt/ruby_build/builds/#{ruby_version}/bin/bundle"
     notifies :run, "execute[systemctl daemon-reload]", :delayed
-    # notifies :restart, "service[mastodon-web]", :delayed
+    notifies :restart, "service[mastodon-web]", :delayed
   end
 
   service "mastodon-web" do
@@ -130,9 +142,9 @@ application mastodon_path do
     source "mastodon-sidekiq.systemd.service.erb"
     variables user: user,
               app_dir: mastodon_path,
-              bundle_path: '/opt/ruby_build/builds/opt/mastodon/bin/bundle'
+              bundle_path: "/opt/ruby_build/builds/#{ruby_version}/bin/bundle"
     notifies :run, "execute[systemctl daemon-reload]", :delayed
-    # notifies :restart, "service[mastodon-sidekiq]", :delayed
+    notifies :restart, "service[mastodon-sidekiq]", :delayed
   end
 
   service "mastodon-sidekiq" do
@@ -147,7 +159,7 @@ application mastodon_path do
               app_dir: mastodon_path,
               port: node["kosmos-mastodon"]["streaming_port"]
     notifies :run, "execute[systemctl daemon-reload]", :delayed
-    # notifies :restart, "service[mastodon-streaming]", :delayed
+    notifies :restart, "service[mastodon-streaming]", :delayed
   end
 
   service "mastodon-streaming" do