Flatpak for the Linux desktop version

Is your feature request related to a problem? Please describe.
A Flatpak for the Linux desktop version be offered.

Describe the solution you'd like
Offer a Flatpak for the Linux desktop version.

[vgmoose]

I'd like to one day, but right now the PC user experience is not good enough to justify it. Primarily, it needs an SD card / root folder destination selector, and the ability to customize the list of repositories in the GUI.