Proxmox can do containers too and has other benefits like really good ZFS support. I only have a couple of VMs and everything else in containers on my little Proxmox server.

Proxmox can do LXC and has some experimental support for converting Docker based images... that said, it's not the same as Docker/Podman support, which are more feature rich.

I would suggest at least a minimal Linux Server VM if you're running containers, underneath ProxMox or on a bare metal install if you don't need other virtualization on said server.