Support for SystemD-Free Distributions

[pibiba]

Hello!

Currently, as far as I can tell, CasaOS uses SystemD, which is used by many GNU/Linux distributions, but not all! Users of distributions such as Artix (OpenRC, Runit, s6, dinit), Gentoo (OpenRC, SystemD) and Void (Runit) cannot use CasaOS because of the latter's binding to SystemD.

Could you please add these init systems as well?

Thanks!