Server start with default Lucee server: does not get any extensions installed in Commandbox core lucee

I am building a super slim commandbox alpine image using box-slim. I install a handful of Lucee extensions using:

This works and the extensions are then available in the CLI. However, when I do server start using the default built in Lucee engine, the extensions are not available to the running server (would be useful for running tests, for instance).

Pull request: