Review systemd examples for podman

[colisee]

Changes

• The creation of the cron container is optional
• Use absolute paths instead of relative paths
• Rewrite the systemd section based on the utilization of a kube quadlet

[ikke-t]

I see this is needed to work also in Debian. Changes looks good to me. I believe more fresh distro users want to go the quadlet way though. But perhaps the kube way once debian catches up, and in meanwhile this works for the both.