Describe the solution you'd like

The alpine-slim images ship with a debug version of nginx at /usr/sbin/nginx-debug. This binary, intended just for debugging purposes, should not be included in the image since it increases the size unnecessarily, while the goal for slim images is to provide the bare minimum to have nginx working (and debugging it's not the bare minimum).

Shipping nginx-debug its like shipping an application to production with debugging symbols, which is definitely a bad practice.

Describe alternatives you've considered

I'm currently building my own version of this container and I remove that binary, but I believe this specifically is something that should come out of the box for everyone.

Additional context

If a user requires debugging for some special circumstance, a simple switch to the equivalent non slim tag would be enough.