Although systemd has been the object of many controversies, to the point the some distributions were forked just to get rid of it (see Devuan, a fork of Debian which, by default, replaces systemd with sysvinit), in the end it has become the de-facto standard init system in the Linux world.
This is a companion discussion topic for the original entry at https://linuxconfig.org/how-to-create-systemd-service-unit-in-linux