New dockerfile and docker-compose files

[arshbot]

Had a ton of issues running this repo locally (macOS 14, apple silicon). Eventually abandoned all effort to run things locally, found the dockerfile.md but still had a bunch of issues related to locales. Whipped up my own dockerfiles, pushing upstream. If the contribution is welcome, I can modify the dockerfile.md file to support this

[arshbot]

hmm, i see the efforts to upgrade ruby from 2.6.x. Once that's wrapped up, I can update this and get this into mergable state

[bitschmidty]

@arshbot thanks and a couple things here. The move to ruby 2.6.x is likely instead a move away from jekyll altogether

That said, if there is improvement to our build system in the meantime in the form of improved docker support, Im for that.

Since we already have a docker file for the repo, we should probably update that one to better handle all usage instead of creating a new one. Im not super familiar with docker and how to parse the diff between the two and what your issue with the original docker file might be, so perhaps you can help me with that (if this is something you want to continue to pursue)