Package as a Flatpak for Linux

[12people]

It'd be great to have an easy-to-install build for Linux.

Flatpak would be ideal, as it's the most commonly supported Linux app container format, it's distro-independent and requires basically no maintenance.

[12people]

Here's documentation on how to package an Electron app via Flatpak: https://docs.flatpak.org/en/latest/electron.html