http://stackoverflow.com/questions/44028325/the-proper-way-to-store-load-statics-in-ember-app

controllers.application.js

import Ember from 'ember';
export default Ember.Controller.extend({
  myService: Ember.inject.service(),
  appName: 'Ember Twiddle'
});

routes.application.js

import Ember from 'ember';
export default Ember.Route.extend({
  myService: Ember.inject.service(),
  beforeModel()
  {
    return Ember.RSVP.all([this.get('myService').loadData()]);
  }    
});

services.my-service.js

import Ember from 'ember';
export default Ember.Service.extend({
  defaultHeaderModel:{},
  loadData(){
    var myServiceDataLoadPromise = Ember.RSVP.Promise.resolve({one:1});
    myServiceDataLoadPromise.then(result =>{
      this.set('defaultHeaderModel',result);
    });
    return myServiceDataLoadPromise;
  }
});

templates.application.hbs

<h1>Welcome to {{appName}}</h1>
<br>
{{myService.defaultHeaderModel.one}}
<br>
{{outlet}}
<br>
<br>

twiddle.json

{
  "version": "0.12.1",
  "EmberENV": {
    "FEATURES": {}
  },
  "options": {
    "use_pods": false,
    "enable-testing": false
  },
  "dependencies": {
    "jquery": "https://cdnjs.cloudflare.com/ajax/libs/jquery/1.11.3/jquery.js",
    "ember": "2.12.0",
    "ember-template-compiler": "2.12.0",
    "ember-testing": "2.12.0"
  },
  "addons": {
    "ember-data": "2.12.1"
  }
}