[Unit]
After=network-online.target
Wants=network-online.target
Wants=time-sync.target
After=time-sync.target
Wants=systemd-growfs-root.service
After=systemd-growfs-root.service

[Service]
Type=idle
ExecStart=/usr/local/libexec/dch-firstboot.sh
ExecStartPost=-/usr/bin/systemctl disable %n
StandardOutput=journal+console

[Install]
WantedBy=multi-user.target