renamed config.serve_static_assets to config.serve_static_files

config/environments/production.rb

@@ -20,7 +20,7 @@ Rails.application.configure do
   # config.action_dispatch.rack_cache = true
 
   # Disable Rails's static asset server (Apache or nginx will already do this).
-  config.serve_static_assets = false
+  config.serve_static_files = false
 
   # Compress JavaScripts and CSS.
   config.assets.js_compressor = :uglifier

config/environments/test.rb

@@ -13,7 +13,7 @@ Rails.application.configure do
   config.eager_load = false
 
   # Configure static asset server for tests with Cache-Control for performance.
-  config.serve_static_assets  = true
+  config.serve_static_files   = true
   config.static_cache_control = 'public, max-age=3600'
 
   # Show full error reports and disable caching.