Create a nginx_certbot_site resource to remove duplication

It creates a folder, the nginx vhost for certbot and HTTP redirects, and
also runs certbot and recreates the nginx vhost that includes the TLS
cert

site-cookbooks/5apps-hubot/templates/default/nginx_conf_hubot.erb

@@ -5,19 +5,6 @@ upstream _express_<%= @server_name.gsub(".", "_") %> {
   server localhost:<%= @express_port %>;
 }
 
-server {
-  listen 80;
-  server_name <%= @server_name %>;
-
-  # For Let's Encrypt ACME verification
-  location /.well-known {
-    root "/var/www/<%= @server_name %>";
-  }
-  location / {
-    return 301 https://$host$request_uri;
-  }
-}
-
 server {
   <% if File.exist?(@ssl_cert) && File.exist?(@ssl_key) -%>
   listen 443 ssl http2;