title: Where is "vue.config.js" file?
body: <p>I've just started to learn Vue but I simply can't set up enviroment for my container.
  I use Cloud9 and I have to assign my host for serving Vue app according to <a href="https://forum.vuejs.org/t/vue-serve-how-to-bind-public-ip/41104/5" rel="noreferrer">this link</a>.</p>
  
  <p>Unfortunately, I can't find <code>vue.config.js</code> file to do this.</p>
  
  <p>Also there is no path indication in <a href="https://cli.vuejs.org/config/#vue-config-js" rel="noreferrer">Vue docs</a>.</p>
  
  <p><code>"if it's present in your project root..."</code> but what if not? Whatever, go use React? :)</p>
  
  <p>Vue version: 3.1.1</p>