building slim and current default.

[mathematicalmichael]

starting work on #27

this initial PR replaces the current workflow with two in parallel which check not only the integrity of the build options, but also that the image can actually build.
I may or may not keep the "split files" approach. Can't decide which I prefer. Thoughts? My thinking was that main.yml was growing very long.

[mathematicalmichael]

hm for some reason it's re-building itself when start_local is run. Not sure why it's not using cached layers, but I'll fix this with adding a makefile which separates building from running. start_local sounds like it should start something that exists, not build it.

[ChristophSchranz]

hm for some reason it's re-building itself when start_local is run. Not sure why it's not using cached layers, but I'll fix this with adding a makefile which separates building from running. start_local sounds like it should start something that exists, not build it.

Yes, start_local is meant to build and run the image in one line of code.

[ChristophSchranz]

Super that you found the time for this PR! 🎉

[mathematicalmichael]

ah! I wasn't expecting this to get merged. I want to finish a bunch more changes but wanted to get this started testing against your repo. This doesn't actually add any features to the repo.

I'll open up another PR when I get more time to, but you can already docker pull gupyter/minimal-notebook (see the PR in my fork)

I still have to do the refactors so that we tag with the same patterns as the original docker stacks.