lubson/toodoo — comment on commit 9f244992e050ddf5a883ad008e13122f5c6cdbd4
File:  line 0
By deepj:

http://devcenter.heroku.com/articles/cedar

> Ruby webserver (Webrick vs Thin)
>
> Because Cedar doesn’t inject any gem dependencies into your app, a vanilla Rails app will run on Webrick (the built-in webserver in the Ruby standard library). We highly recommend Thin for all apps. To use Thin, add it to your Gemfile: