MinimServer on Docker on QNAP. Won't start clean.

[JimR]

I am trying to setup MinimServer in a Docker container on my QNAP NAS. I used what knowledge I have, but could not get it to work, so asked claude.ai if it could help me figure out was going wrong. It did many tests but failed also. So I asked Claude what I should ask the forum. Here's what he said....

==================

I am running MinimServer in a Docker container on a QNAP NAS using the official minimworld/minimserver:2.2 image. I have no native MinimServer installation — this is a clean Docker-only setup.

The container starts, auto-updates to update 274, relaunches, and then immediately exits with this error:

MinimServer shared folder on host is not shared with this container
MinimServer: startup error

My compose.yml is:

services:
minimserver:
image: minimworld/minimserver:2.2
container_name: minim-qnap2
network_mode: host
volumes:
- /share/docker/minim-qnap2/Library:/MinimServer
- /share/audio:/Music:ro
environment:
- TZ=Europe/London
restart: unless-stopped

The original 2.2 jar appears to start successfully — the error only occurs after the relaunch under update 274. I have also tried mounting an empty folder as /MinimServer but this makes no difference.

My questions are:

What check does update 274 perform for the MinimServer shared folder, and what does it expect to find?

Is there a way to disable auto-update so the container stays on 2.2 without update 274?
What is the correct Docker setup for a clean install with no pre-existing native MinimServer folder?

==================

I don't have the skills to verify what he is saying. Can anyone help me? Does anyone have a compose.yml file that works for them on QNAP?

Thanks, Jim