Support old browsers

[sthuber90]

I am running MagicMirror on a raspberry pi in server only mode and use an old iPad that does not receive any updates anymore as a digital picture frame. As it is still a small computer I want to not only show images, but show calendar, weather, and some other information as well. MagicMirror seemed like the perfect solution. Unfortunately, it became clear that MagicMirror does not support nor want to support old browsers i.e. Safari < 11 (MagicMirrorOrg/MagicMirror#1908 (comment), MagicMirrorOrg/MagicMirror#1985) and places this feature/responsibility on the users. This requires babel and webpack to pre-compile some of the modules and scripts before starting the server.

Is this something that could be part of this docker image? Maybe even as a separate tag to have the option of pure or pre-compiled images?

[sthuber90]

Switched to use the new "official" docker image for MagicMirror https://gitlab.com/khassel/magicmirror