title: Does not work with "type": "module" in "package.json"
body: <p>i run npm start</p>
  
  <p>get the error</p>
  
  <pre><code>(node:1079) Warning: To load an ES module, set "type": "module" in the package.json or use the .mjs extension.
  /Users/sangkuoh/Desktop/Udacity_FEND_TravelApp-master/src/server/server.js:61
  export default { app };
  ^^^^^^
  </code></pre>
  
  <p>why this don't work? :)</p>