I think it would be massively helpful if the devs would upload a DEB/Flatpak file somewhere instead of having compilation instructions as the primary install method. Sure, if you run a funky Linux like OpenSUSE you need to follow and convert installation instructions, but for Ubuntu (which the guide is targeting) you really don't anymore.
That being said, on Arch (and Arch-derived) systems you can find this in the standard software store under the name snis-git if you've enabled the AUR.