Hi @marcus, I would really like to get that working at my side too.
I tried to use the N8N_CUSTOM_EXTENSIONS environment variable and put in my local folder, which contain custom nodes. I tried with a folder type inside and outside the docker container but the nodes are not showing up.
I just add the environment variable and started the docker stack/container (running in queue mode).
Is there anything missing? How do I get the nodes working from the UI?