Node version

how can I change the nove version from 16 to 14 or 12 on my project?

Not possible at the moment (using provided buildpacks). If you want, you can provide a Dockerfile and use Dockerfile application mode, there you can use any node version you want.

This post can be a solution to your problem:

I have specified Node 10 in Dockerfile and it works flawlessly.

In Dockerfile, just add this line and change 10 to any version you want.
FROM node:10

thanks a lot for your help :slight_smile:

I could not set the port see the issue here

No, i mean specifying node and npm version in package.json, in case using buildpack

"engines": {
    "node": "12.x",
    "npm": "6.x"

If you want to use yarn to install packages, include your yarn.lock (instead of package-lock.json) when pushing your code to github