Cross-platform compilation and package/installer building

[rpherbig]

The Electron quickstart guide recommends using electron-forge

It looks like we'll need a Mac or Linux machine to build the packages/installers for non-Windows platforms. See https://stackoverflow.com/questions/66963414/electronforge-build-app-for-other-platform and https://www.turtle-techies.com/how-to-package-your-multiplatform-electron-app/ and https://www.electronforge.io/config/makers/deb

[DrSeabass]

Notes on how to build installers for various platforms: https://www.turtle-techies.com/how-to-package-your-multiplatform-electron-app/

We were accidentally building .deb and .rpm packages on linux from the outset. This (building two installers) is part of why the build process felt so sluggish.

Article contains info on how to do things like setup installer icons when building as well.