Just remember to do things the daemontools way, and chain to the final daemon binary from that script with the shell's exec command, and systemd should be happy.

Contrast:

* https://plone.lucidsolutions.co.nz/software-development/issu...

And the redirection to $LOG and Poor Man's Daemon Supervisor in some people's youtrack.sh:

* https://www.howtoforge.com/running-youtrack-issue-and-projec...