Here's how I got NodeBB up and running on the Google Cloud Platform.
The following are the steps I took:

Created VPC firewall rule with 4567 port.

Deployed Compute Engine VM Instance with Ubuntu Pro 20.04

Install NodeBB via the Web Interface.

Install Let's Encrypt Wildcard SSL on Nginx.

The documentation for setting up NodeBB on Compute Engine can be found here.
[Installing NodeBB on Compute Engine] (https://www.incapio.com/post/install-nodebb-forum-on-compute-engine-google-cloud-gcp)