Build artefact: Flatpaks

[stephengaito]

Should we build/release Flatpaks?

[stephengaito]

Flatpak packages are an alternative to debian archives, which however are potentially useable by Linux distributions outside of the Debian family of distributions.

However they require the installation of a flatpak infrastructure before the desired flatpak can even be installed.

I personally do not see the use case for building flatpaks for the pdf2htmlEX project.

We already have the Debian archives... I suggest that we build/release AppImages (#2) instead.