URL Shortner using Rails 4

• This is a URL Shortener written in Rails 4.
• The Rails app is nested in the app directory because I plan to make it multi-module (client/server etc)
• Main Gems used outside of the Rails framework are twitter-bootstrap-rails and rspec-rails.
• Currently it is deployed on https://safe-retreat-2771.herokuapp.com , feel free to check it out.

Shorteners like Bitly use Base62(checkout Base64) encoding for shortened URLs(62 characters A-Za-z0-9). This one doesn't use the Base62 encoding. Since ActiveRecord gives each object a uniqe id (1, 2, ...), I decided it was simpler and more elegant to just use that, even if that meant slightly longer URLs once the traffic exceeds, let's say 10000 URLs(!). So the shortend URLs are of the format ...com/1, etc.

===Future Improvements===

• I'm excited about Docker so I am going to try to deploy this using Docker, maybe even Kubernetes if I have time for that.
• To use Base62 encoded short keys, I'd want to port to persistent Redis or Mongo backend.
• Make it a microservice with a separate (may be EmberJS) frontend.