Present config.public_file_server.enabled as opt-out

Follow-up to rails#47137.

Since `config.public_file_server.enabled` is true by default, this
commit changes the `config/environments/production.rb` template to
present the setting as an opt-out.

Author: jonathanhefner

actionmailbox/test/dummy/config/environments/production.rb

@@ -20,8 +20,8 @@
   # or in config/master.key. This key is used to decrypt credentials (and other encrypted files).
   # config.require_master_key = true
 
-  # Enable static file serving from the `/public` folder (turn off if using NGINX/Apache for it).
-  config.public_file_server.enabled = true
+  # Disable serving static files from `public/`, relying on NGINX/Apache to do so instead.
+  # config.public_file_server.enabled = false
 
   # Compress CSS using a preprocessor.
   # config.assets.css_compressor = :sass

actiontext/test/dummy/config/environments/production.rb

@@ -20,8 +20,8 @@
   # or in config/master.key. This key is used to decrypt credentials (and other encrypted files).
   # config.require_master_key = true
 
-  # Enable static file serving from the `/public` folder (turn off if using NGINX/Apache for it).
-  config.public_file_server.enabled = true
+  # Disable serving static files from `public/`, relying on NGINX/Apache to do so instead.
+  # config.public_file_server.enabled = false
 
   # Compress CSS using a preprocessor.
   # config.assets.css_compressor = :sass

activestorage/test/dummy/config/environments/production.rb

@@ -20,8 +20,8 @@
   # or in config/master.key. This key is used to decrypt credentials (and other encrypted files).
   # config.require_master_key = true
 
-  # Enable static file serving from the `/public` folder (turn off if using NGINX/Apache for it).
-  config.public_file_server.enabled = true
+  # Disable serving static files from `public/`, relying on NGINX/Apache to do so instead.
+  # config.public_file_server.enabled = false
 
   # Compress CSS using a preprocessor.
   # config.assets.css_compressor = :sass

railties/lib/rails/generators/rails/app/templates/config/environments/production.rb.tt

@@ -22,8 +22,8 @@ Rails.application.configure do
   # key such as config/credentials/production.key. This key is used to decrypt credentials (and other encrypted files).
   # config.require_master_key = true
 
-  # Enable static file serving from the `/public` folder (turn off if using NGINX/Apache for it).
-  config.public_file_server.enabled = true
+  # Disable serving static files from `public/`, relying on NGINX/Apache to do so instead.
+  # config.public_file_server.enabled = false
 
   <%- unless skip_sprockets? -%>
   # Compress CSS using a preprocessor.