systemd service

[Unit]
Description=app

[Service]
# This will allow using `systemd:notify/1` for informing the system supervisor
# about application status.
Type=notify
#Type=simple
# Application need to start in foreground instead of forking into background,
# otherwise it may be not correctly detected and system will try to start it
# again.
ExecStart=/root/....aa foreground
# Enable watchdog process, which will expect messages in given timeframe,
# otherwise it will restart the process as a defunct. It should be managed
# automatically by `systemd` application in most cases and will send messages
# twice as often as requested.
#
# You can force failure by using `systemd:watchdog(trigger)` or manually ping
# systemd watchdog via `systemd:watchdog(ping)`.
WatchdogSec=10s
Restart=on-failure

[Install]
WantedBy=multi-user.target


/etc/systemd/system/*.service
sudo systemd-analyze verify NAME.service
https://www.codercto.com/a/100315.html
https://github.com/hauleth/erlang-systemd
https://hexdocs.pm/systemd/