Dunno how to reply inline,

#4 this was a fat finger issue, should have been "error: could not change permissions of directory "/var/lib/postgresql/data": Operation not supported

I've tried: "/mnt/Joplin:/var/lib/postgresql/data"

DOES NOT WORK....

I just changed the compose-docker.yml from:

"/data/joplin-data:/var/lib/postgresql/data" -> which provides a working system.

to:

"/mnt/joplin-data:/var/lib/postgresql/data" -> which creates a non-working system

This was the only change in the yam file.

This is the output:

This is the contents of the two folders (from Midnight Commander) I copied the contents of /data/joplin-data to /mnt/joplin-data before changing the yml file.

Changing back to /data/joplin-data results in:

I genuinely do NOT think this is a Joplin Server issue. I think it's a postgresql issue. that's why I posted the issue here https://github.com/etechonomy/joplin-server