Making it so that files will get gzipped. Because the heroku cedar stack no longer uses nginx, gzip compression must be done by the app: https://devcenter.heroku.com/articles/http-routing#gzipped-responses

jes5e · jes5e · commit 59b19d93b0b1 · 2013-01-14T16:49:58.000-05:00
diff --git a/config.ru b/config.ru
@@ -1,4 +1,5 @@
 # This file is used by Rack-based servers to start the application.
 
 require ::File.expand_path('../config/environment',  __FILE__)
+use Rack::Deflater
 run Selfstarter::Application
