I’m assuming you installed it directly to the container vs running docker in there?
I have been debating making the jump from docker in a VM to a container, but I’ve been maintaining Nextcloud in docker the entire time I’ve been using it and not had any issues. The interface can be a little slow at times but I’m usually not in there for long. I’m not sure it’s worth it to have to essentially rearchitect mely setup for that.
All that aside, I also map an NFS share to my docker container that stores all my files on my NAS. This could be what causes the interface slowness I sometimes see, but last time I looked into it there wasn’t a non hacky way to mount a share to an LXC container, has that changed?