DOC: Contributing guide docker expansion
Added instructions for creating development environment with docker on windows, mac os and unix.

- [ ] closes #xxxx
- [ ] tests added / passed
- [ ] passes `black pandas`
- [ ] passes `git diff upstream/master -u -- "*.py" | flake8 --diff`
- [ ] whatsnew entry

Sure, let me know how you’d like it to look. I can shorten it a bit if needed. How much documentation do we want on installing Docker itself?

Isn't that something we should just link to in Docker's official docs?  Keep in mind that you would have to keep updating this as Docker itself evolves. IMO just a link to https://docs.docker.com/get-docker/ should be enough, though I'd keep the "**Test your Docker installation**" section because if you don't get that right (e.g. because you still need `sudo` to run `docker run`) then the next part won't work I'm no Docker expert either, but looks good to me, thanks @fdanieluk for your work on the docs, it really makes it accessible I agree with @gfyoung here in that we really should just link to the external docs here Hi @fdanieluk - is this still active? Closing as stale, but please ping if you'd like to continue working on this