@bndw @moderation PTAL and let me know what you think. I think the only thing remaining after this is to figure out how to deal with the Dockerfiles. I read a bit, and I think one can use env var substitution in those files in FROM clauses, so I think with a bit of doc work we can probably make it happen. We might need to move some of the MD sandbox instructions into sphinx though to make this happen.

@moderation any interest in looking at ^ since you have been working in that area recently?

cc @htuch I fixed one of your TODOs from a while ago.

@htuch updated