Google Cloud Functions, Node JS 8.9.x (LTS) and KOA library

Question

How can I use Koa library, the express replacement, in Cloud Functions?

I know KOA use all great ES2017 and make more use of Async use of JavaScript.

or it

Answer 1

I just saw in Cloud Functions Console editor for one of my functions that Node 8 is now a runtime option. See screenshot: