add Dockerfile and configure production app

config/initializers/active_storage.rb

@@ -6,6 +6,8 @@ ActiveSupport.on_load(:active_storage_attachment) do
   has_many_attached :preview_images
 end
 
+ActiveStorage::LogSubscriber.detach_from(:active_storage) if Rails.env.production?
+
 Rails.configuration.to_prepare do
   ActiveStorage::DiskController.after_action do
     response.set_header('Cache-Control', 'public, max-age=31536000') if action_name == 'show'

config/initializers/migrate.rb

@@ -0,0 +1,3 @@
+# frozen_string_literal: true
+
+ActiveRecord::Tasks::DatabaseTasks.migrate if ENV['RAILS_ENV'] == 'production'