title: VueJS exclude a config file from being bundled
body: <p>I'm using the <code>vue-webpack</code> template and a <code>appConfig.js</code> file to store the API url and some other variables. The API url should be changed after build.</p>
  
  <p><code>appConfig.js</code> file looks like this:</p>
  
  <pre><code>export { BASE_URL, ACCOUNT, NOTIFICATIONS };
  
  const BASE_URL = 'apiurl';
  const ACCOUNT = ....
  </code></pre>
  
  <p>In the app, I use this config file through an import. </p>
  
  <pre><code>import { BASE_URL, ACCOUNT } from '../appConfig';
  </code></pre>
  
  <p>I would like to keep this file out of the bundling process and add it in the build afterwards. I heard about <code>externals</code> in webpack conf but I can't managed to get it works with my app. Or maybe there is another way to handle this ?</p>