[feature request] publish our ruby fish shell on docker hub

[DerekNonGeneric]

The ruby fish shell docker dev environment that we are using in the openinf/openinf.github.io repository should probably be sharable and available for use elsewhere and between projects. It might be a bit too heavy for our 6 commonjs package repos, though, since they seem like they won't be needing much more than our Node.js Gallium runtime and toolchain to get everything built and taken care of…

/cc @jorgebucaran as i have no experience w/ publishing to docker hub :/

[jorgebucaran]

It's not all that different from pushing a repo to GitHub. You must sign up for Docker Hub first, and create a repo there. Then using the docker CLI, login, tag the image, and docker push it. 🤓