title: Google Cloud Functions, Node JS 8.9.x (LTS) and KOA library
body: <p>How can I use <a href="http://koajs.com/" rel="nofollow noreferrer">Koa</a> library, the express replacement, in Cloud Functions?</p>
  
  <p>I know KOA use all great ES2017 and make more use of Async use of JavaScript. </p>
  
  <p>or it might not be needed at all working with Cloud Functions because the Firebase system won't send multiple calls to the same Cloud Function until it ends the previous one? </p>
  
  <p>it unclear to me.</p>
  
  <p>it know demands Node 8.x and I know the NodeJs 8.9.x, has now LTS.</p>