proxmox
Setup
#/etc/apt/sources.list
deb http://ftp.pt.debian.org/debian bullseye main contrib
deb http://ftp.pt.debian.org/debian bullseye-updates main contrib
deb http://download.proxmox.com/debian/pve bullseye pve-no-subscription
# security updates
deb http://security.debian.org bullseye-security main contrib
As workstation
check for more information how to setup proxmox instalation as workstation