title: webpack dev server port
body: <p>I need to change which port <code>webpack-dev-server</code> listen to.</p>
  
  <p>Up to now, I've created these there files:</p>
  
  <ul>
  <li><a href="https://gist.github.com/jeusdi/134e19006a6f8da06bf4123c35d8a8a7" rel="nofollow noreferrer">webpack.common.js</a></li>
  <li><a href="https://gist.github.com/jeusdi/365e8cc433ef629d6246776dce0e3092" rel="nofollow noreferrer">webpack.dev.js</a></li>
  <li><a href="https://gist.github.com/jeusdi/919e6228b753cbe67f72edfd613a8c99" rel="nofollow noreferrer">webpack.prod.js</a></li>
  </ul>