Not to be snarky… really… I’m concerned that MagicMirror isn’t being maintained. During installation there are a lot of deprecated node.js module warnings, and security warnings…
As others have said, most of your problems are because you use Raspbian Lite.
That being said: you have a point. The auto installer script isn’t maintained as well as I want it to be. Due to the fast development speed of Raspbian, it runs into issues. Since most of the contributors don’t install the core from scratch very often, we don’t run into these issues.
I’m considering deprecating the automatic installer and suggesting to manual install Node, clone MagicMirror and then run
npm install. To be fair: that’s how I install my MagicMirror.
Of course, PR’s to fix the auto-installer are more than welcome!