Find a way to route root to a controller action.

[CzechsMix]

This is a requirement to implement #331 and return a welcome page at "mynewluxapi.com/"

export default function routes() {
  //Idea
  this.root.get('controllerName', 'actionName');

  //route to the index function of the ApplicationController
  this.root.get('application', 'index')
}