@01 What is the error you are receiving when you visit your site?
If you can access your site, but it says the connection is insecure, then part of your certificate chain is missing or invalid.
Bringing an old thread to life again, sorry!
I'd also love some help with the instructions for running this in a Docker image. It would make life a bit easier for deploying this in DigitalOcean.
@Verpz share your Apache config. I suspect it to be wrong.
Also check the log files of NodeBB for any errors.