title: How to add a custom environment for Ember js?
body: <p>I'm using Ember.js <code>2.5.0</code> and it seems at the moment Ember is limited to the three environments <code>development</code>, <code>test</code> and <code>production</code>. How can I add some other env like as for example <code>staging</code>? </p>
  
  <p>I have a staging server so we can test our app and I want to use different configurations there (than the development one). Any workaround to do that? </p>