Add to Flathub

[Belsedar]

Probably already planned but it would be nice if this was on Flathub

Nice projects, cant wait to use it!

[Jeffser]

Hi yes, I'm already familiar with Flathub (I have 3 apps on there already) so this is something I'm definitely going to do in a couple of days, maybe a week.

For now I'm working on some UI changes and fixes so that it is ready for the big Flathub release