linstrom/frontend-reactive/app/router.ts

import EmberRouter from '@ember/routing/router';
import config from 'frontend-reactive/config/environment';

export default class Router extends EmberRouter {
  location = config.locationType;
  rootURL = config.rootURL;
}

Router.map(function () {
  this.route('about');

  this.route('notes', function () {
    this.route(':note_id');
  });
});