Ember Routing Issue

adapters.application.js

import DS from 'ember-data';

export default DS.RESTAdapter.extend({
  host: 'http://localhost:3000/api'
});

controllers.application.js

import Ember from 'ember';

export default Ember.Controller.extend({
  appName: 'Ember Twiddle'
});

models.todo.js

import Model from 'ember-data/model';
import attr from 'ember-data/attr';
import { belongsTo, hasMany } from 'ember-data/relationships';

export default Model.extend({
});

router.js

import EmberRouter from '@ember/routing/router';
import config from './config/environment';

const Router = EmberRouter.extend({
  location: 'none',
  rootURL: config.rootURL
});

Router.map(function() {
  this.route('todos', { path: '/' });
});

export default Router;

routes.todos.js

import Ember from 'ember';

export default Ember.Route.extend({
  model: function() {
    return this.store.findAll('todo');
  }
});

templates.application.hbs

<h1>Welcome to {{appName}}</h1>
<br>
<br>
{{outlet}}
<br>
<br>

templates.todos.hbs

<section id="todoapp">
  <header id="header">
    <h1>todos</h1>
  {{input type="text" id="new-todo" placeholder="What needs to be done?" value=newTitle action="createTodo"}}
  </header>

  <section id="main">
  <ul id="todo-list">
  {{#each itemController="todo"}}
    <li {{bind-attr class="isCompleted:completed isEditing:editing"}}>
    {{#if isEditing}}
      {{input insert-newline=(action "acceptChanges")}}
    {{else}}
        {{input type="checkbox" checked=isCompleted class="toggle"}}
        <label {{action "editTodo" on="doubleClick"}}>{{title}}</label>
      <button {{action "removeTodo"}} class="destroy"></button>
    {{/if}}
    </li>
  {{/each}}
  </ul>

    <input type="checkbox" id="toggle-all">
  </section>
</section>

<footer id="info">
  <p>Double-click to edit a todo</p>
</footer>
{{outlet}}

twiddle.json

{
  "version": "0.15.0",
  "EmberENV": {
    "FEATURES": {}
  },
  "options": {
    "use_pods": false,
    "enable-testing": false
  },
  "dependencies": {
    "jquery": "https://cdnjs.cloudflare.com/ajax/libs/jquery/3.3.1/jquery.js",
    "ember": "3.2.2",
    "ember-template-compiler": "3.2.2",
    "ember-testing": "3.2.2"
  },
  "addons": {
    "ember-data": "3.2.0"
  }
}