Add OSTree Support

[mystic-githuber]

Dear Devs,

Fedora's Immutable spins are becoming popular. It would be great if you could provide OSTree support similar to iVPN.

https://www.ivpn.net/knowledgebase/linux/fedora-silverblue/

[CaptainMuskrat]

As a Fedora Silverblue user, I wholeheartedly agree. It's why I also suggested a Flatpak or even an Appimage release too.