Use dalli memcache client in production

config/environments/production.rb

@@ -52,7 +52,7 @@ Asciinema::Application.configure do
   # config.logger = ActiveSupport::TaggedLogging.new(SyslogLogger.new)
 
   # Use a different cache store in production.
-  config.cache_store = :mem_cache_store
+  config.cache_store = :dalli_store
 
   # Enable serving of images, stylesheets, and JavaScripts from an asset server.
   # config.action_controller.asset_host = "http://assets.example.com"