Upgraded to Rails 4

config/environments/development.rb

@@ -1,6 +1,8 @@
 Fetsite::Application.configure do
   # Settings specified here will take precedence over those in config/application.rb
 
+  config.serve_static_files = false
+
   # In the development environment your application's code is reloaded on
   # every request. This slows down response time but is perfect for development
   # since you don't have to restart the web server when you make code changes.

config/environments/production.rb

@@ -3,7 +3,8 @@ Fetsite::Application.configure do
 
   # Code is not reloaded between requests
   config.cache_classes = true
-
+  config.serve_static_files = true
+  
   # Full error reports are disabled and caching is turned on
   config.consider_all_requests_local       = false
   config.action_controller.perform_caching = true

config/environments/test.rb

@@ -8,7 +8,7 @@ Fetsite::Application.configure do
   config.cache_classes = true
 
   # Configure static asset server for tests with Cache-Control for performance
-  config.serve_static_assets = true
+  config.serve_static_files = false
   config.static_cache_control = "public, max-age=3600"
 
   # Log error messages when you accidentally call methods on nil