title: Yii2: how to set the default action into the controller
body: <p>I know how to set the default controller/action into the configuration by the <code>defaultRoute</code> option</p>
  <pre><code>'defaultRoute'        =&gt; 'home/index'
  </code></pre>
  <p>But I don't how do it with the action into the current controller.</p>
  <p>Can anybody help me?</p>