[TUTORIAL] Tutorial: Unprivileged LXCs - Mount CIFS shares

Thanks, op. This worked great.

Proxmox -> LXC Debian 13 running docker -> Immich container
The Immich container is using an encrypted smb-shared TrueNAS Scale dataset dedicated to Immich, with the Immich container as the only user with access.

Photos are backing up now. Looks like it worked. :)

One thing to note (thanks to Immich's docs!) is that I had to go to my NAS and set my ACL mode to Passthrough in my dataset. Before that, Immich would fail its startup checks and not load.
I am doing the same with immich, but got a Problem. The share is accessible via cli and user root. But not with immich. No read permission. Can you give me a hint?
There is no user "immich" to authorize to tha share.