Need help creating Node-RED images from a container by source

Can you teach me how to create custom Node-RED image with my choice of module?
I can document the process and create a pull request to your github.

That is not easy right now. Whenever a nodered get started I created a dedicated folder for package.json and modules based of the userid it’s running as ( I think it would be better this was a fixed directory when running in docker, but right now it’s not working like that )
The next issue is that Nodered use the storage module “getsettings” to know what packages have been installed, so even if you got that folder updated with a package.json it would get overriden by the settings from openflow.
So depending on why you need this, could updating settings in openflow not be the solution for you ? This would make my storage provider install all the packages before nodered starts.