Today I experimented a bit with Dockerfile's.
Was quite surprised how far you could go with a spicy salsa of ARG, ENV, SHELL and multi stage builds.

But... For fucks sake....the debugging is like poking a light year long rod into a black hole, trying to fish something out of the event horizon....

In the end I got a nice setup for Java build's, version injectable with ENV/ARG, non root user and version specific behaviour.

As the debugging is non existing...

I filled up more than once my SSD....

It was an annoying brain damaged repetitive cycle of changing Dockerfile, pruning all images if docker build stopped because of missing free space, waiting for all stages to complete, start new.

And caching is a fragile thing that puzzles me .........

Guess more fishing tomorrow.

*Gives a happy deep throat to the beer bottle in hope of death*