Setting up Ember.js (ember-cli) with Rails

I received quite some feedback on my article about setting up Ember.js in Rails app, the most common being ember-cli. ember-cli is the canonical way of running Ember apps, confirmed by the RFC that formalizes the upcoming v2.0 release. While globals-based apps will continue to work in 2.0, we may introduce new features that rely on either Ember CLI or ES6 modules. You should begin moving your app