Eventually this could work. We will see...

This don't need a extra script for minify css

Now lektor detects if the file is local available. If it is, it will use it.
If not, it will use the remote file and linking to the local font folders, because not every browser will accept the remote fonts that easy on localhost.

lektor does not trigger a new build only if a file like main.min.css
suddenly appear or dissappear. It need a manual trigger like deleting
the cache or modify the templeates.

make will now delete the cache.