Why do today what you can make the computer do tomorrow?
Ansible is one of my favorite things to use in my home lab for automating the tasks I dislike, and it's perfect for Proxmox updates with the community.proxmox.proxmox_pct_remote collection module installed. Once that's available, we can create a playbook that creates a dynamic inventory of your Proxmox LXCs and other containers, so that you can call them in other Ansible playbooks: Then we create a playbook like this, that will update Debian/Ubuntu LXCs. If you have other LXC bases, you can adjust accordingly for the package manager, and for the Proxmox tag group that you mihght have them sepa