Docker packs the whole application and its dependencies into a container, hence the name. You can run and delete that application as much as you want without affecting the host system. (But you should probably keep your media library and config outside the container, and use a bind mount. The setup documentation covers this.)

Proxmox can run lxc containers natively.

Personally I keep a Debian VM for docker, a holdover from before hypervisors supported containers natively. I use docker compose and it Just Works™.

I don’t think jellyfin runs on DOS.

VPN. Jellyfin is not intended for direct exposure to the Internet.

You should run it in docker anyway for convenience. A reverse proxy is optional, but I use traefik also for convenience (so that I can just use domain names on the same port, and so that it can automatically fetch certs).

Devuan is Debian with sysv.

Intel’s current corporate nonsense doesn’t affect the quality of existing products. They will continue to be supported under Linux and BSD for a long time.

If you pass a whole raw disk, not virtualized, then TrueNAS should not complain. I don’t know if you can do that in proxmox, I haven’t tried.

Personally I’d get rid of TrueNAS. Even if docker is down, the VM with the data is still up and accessible over anything running on the VM, like scp via ssh.

It sounds like there’s been some change since that happened. I would review the current terms and GPLv3, if that’s the one you want to use.

Where did you read that?

Memtest? Boot a live image and stress test each component?

I don’t think it’s overheating, usually that presents as throttling followed by a thermal protection power off.

Well it’s not open source that I see, so you’ll be doing significant development to match it. There are probably place clones that you can use as a start, then tie in OSM. But that’s far easier said than done.

If you’re adding drives with more capacity, why bother converting? Just create the new one, copy the data, then expand over the old disks.

Have backups for anything you can’t afford to lose, and be patient.

Change.org doesn’t verify legitimacy of signers either.

I’m not aware of one, but if you have the need, you could write it yourself in an afternoon. It’s a simple website. A weekend, if you don’t have much experience.

Not everything runs in a container.

I don’t think you want two VPN services, I think you want one VPN service and plain network routing. Use the VPN server as the local gateway, and the VPN server routes that traffic up the tunnel.

I think you should seek someone with experience, a mentor. Otherwise it’s the blind leading the blind.

It would be easiest to just change the client addresses frequently. You should be able to configure that in your addressing system.

WAF and DMZ too.