Proxmox

On Proxmox VE the simplest and most robust setup is a small Debian VM with Docker. An LXC container also works, but needs a few extra settings.

A Debian VM (recommended)

Download the Debian netinst ISO (Datacenter → your storage → ISO Images → Download from URL, with the link from debian.org).
Create the VM:
- 2 cores, 4 GB memory, 16 GB disk (enough for the system, the image and the preview cache);
- network on your LAN bridge (vmbr0);
- optionally a fixed address via a DHCP reservation on your router.
Install Debian, choosing only SSH server and standard system utilities (no desktop).
Install the site with Docker Compose on Linux.
Models on a NAS: use the NFS add-on. The VM mounts the share itself; nothing is needed on the Proxmox host.

Add the VM to a backup job (Datacenter → Backup). The important part is data/users.db; see Updating and backups.

Docker inside LXC works with these settings:

Create a Debian container (unprivileged is fine) with 2 cores, 2–4 GB memory and 8 GB disk.
Options → Features: enable nesting (and keyctl for an unprivileged container).
Models: an unprivileged container can’t mount NFS itself. Mount the share on the Proxmox host (Datacenter → Storage → Add → NFS, or /etc/fstab) and pass it into the container, read-only:
Terminal window
```
pct set <container id> -mp0 /mnt/pve/3d-prints,mp=/srv/3d-prints,ro=1
```
In an unprivileged container, user 1000 is user 101000 on the host: the files must be readable for that user (or for everyone).
Inside the container, follow Docker Compose on Linux with LIBRARY_DIR=/srv/3d-prints.

If something doesn’t start in LXC, the VM route avoids these details.