shutdown script

I'm new to Proxmox and not finding satisfactory information for shutdown procedures for my Workstation. I want to shut down everything properly when pressing or holding the physical power button. Google Gemini is saying something about installing acpid which hasn't been in Debian since Wheezy...

As described in this thread , the recommended way to set up some commands/scripts to run at startup was to add a @reboot entry in the crontab file. Sometimes I won't be using my Proxmox home server for days, and I don't want it to keep up and running. For that, I have my machine configured to...