Upgrade to rails 6 💎 (#11)

- upgraded to rails 6
- fixes various issues

config/environments/development.rb

@@ -11,14 +11,16 @@ Rails.application.configure do
 
   # Show full error reports.
   config.consider_all_requests_local = true
-  config.web_console.whiny_requests = false
+
   # Enable/disable caching. By default caching is disabled.
-  if Rails.root.join('tmp/caching-dev.txt').exist?
+  # Run rails dev:cache to toggle caching.
+  if Rails.root.join('tmp', 'caching-dev.txt').exist?
     config.action_controller.perform_caching = true
+    config.action_controller.enable_fragment_cache_logging = true
 
     config.cache_store = :memory_store
     config.public_file_server.headers = {
-      'Cache-Control' => 'public, max-age=172800'
+      'Cache-Control' => "public, max-age=#{2.days.to_i}"
     }
   else
     config.action_controller.perform_caching = false
@@ -26,15 +28,17 @@ Rails.application.configure do
     config.cache_store = :null_store
   end
 
-  config.action_mailer.default_url_options = { :host => 'localhost', port: 3000 }
-
-  config.action_mailer.delivery_method = :letter_opener
-  config.action_mailer.perform_deliveries = true
+  # Store uploaded files on the local file system (see config/storage.yml for options).
+  config.active_storage.service = :local
 
   # Don't care if the mailer can't send.
   config.action_mailer.raise_delivery_errors = false
 
   config.action_mailer.perform_caching = false
+  config.action_mailer.default_url_options = { :host => 'localhost', port: 3000 }
+
+  config.action_mailer.delivery_method = :letter_opener
+  config.action_mailer.perform_deliveries = true
 
   # Print deprecation notices to the Rails logger.
   config.active_support.deprecation = :log
@@ -42,6 +46,9 @@ Rails.application.configure do
   # Raise an error on page load if there are pending migrations.
   config.active_record.migration_error = :page_load
 
+  # Highlight code that triggered database queries in logs.
+  config.active_record.verbose_query_logs = true
+
   # Debug mode disables concatenation and preprocessing of assets.
   # This option may cause significant delays in view rendering with a large
   # number of complex assets.
@@ -50,11 +57,10 @@ Rails.application.configure do
   # Suppress logger output for asset requests.
   config.assets.quiet = true
 
-  # Raises error for missing translations
+  # Raises error for missing translations.
   # config.action_view.raise_on_missing_translations = true
 
   # Use an evented file watcher to asynchronously detect changes in source code,
   # routes, locales, etc. This feature depends on the listen gem.
   config.file_watcher = ActiveSupport::EventedFileUpdateChecker
-
 end