Heroku won't display ember-rails app

I have built a basic CRM app to learn Ember. The app uses a Rails back end; and Ember and Rails communicate with a JSON api. Feel free to check out the source code on my GitHub. The app is hosted here.

The app works great in my development environment, and deploys to Heroku with no issues whatsoever.

However, when I navigate to the apps URL I see a blank page. Further inspection using Chrome's dev tools tells me that none of my ember files were sent from Heroku to my browser. What gives?