Set 'config.assets.compile = false' in production

config/environments/production.rb

@@ -16,7 +16,7 @@ Rails.application.configure do
   # config.assets.css_compressor = :sass
   # Don't fallback to assets pipeline if a precompiled asset is missed
-  config.assets.compile = true
+  config.assets.compile = false
   # Generate digests for assets URLs
   config.assets.digest = true