This commit adds a git safe directory to the system config. This is to ensure that the git configurations are securely stored in "/var/lib/gitea/repositories/harald/nixcfg.git".
A new systemd service, `check_root`, has been added which checks disk usage of the root directory. If usage exceeds 85%, an email alert is sent. In addition to this service, a corresponding systemd timer is added to trigger this check daily.
This commit introduces a new systemd service that runs daily to check the disk usage of the /boot partition. If utilization exceeds a set threshold, it triggers a warning email. This will ensure prompt alerts on critically low boot disk space, helping in maintaining a stable system.