code: function(req, res) {
      var emberApp = __dirname + '/../../assets/index.html';
      fs.exists(emberApp, function (exists) {
        if (!exists) {
          return res.notFound('The requested file does not exist.');
        }
  
        fs.createReadStream(emberApp).pipe(res);
      });
    }
docs: `AppController.serve()`
  Serves your Ember App directly from the assets/index.html
  
  Add some custom code before delivering the app if you want
  You could add some analytics, or use this to serve different
  ember apps to differen people.
  That can be useful for limited feature roll-out or A/B Testing, etc.