Building a Proxmox VM template by hand is one of those tasks that sounds simple — boot a VM, install the OS, configure it, clean it up, convert it — but hides a surprising number of fiddly steps. Miss one and your clones inherit stale SSH host keys, the same machine ID, or a network config that fights with Proxmox's cloud-init drive. Do it a second time and you remember you forgot to write down exactly what you did the first time.
build-template.yml automates the entire sequence, end-to-end, with a single command:
make template HOST=pve-01 VMID=2319