Docker Hub Sample images

Still working on mamba. Opened an open source account inquiry with Docker so will eventually place there. In the interim can place on personal account for testing
Just to understand: This is for development with different environment sizes? Yea it could help target different development goals. Alpine would be a super small image (~300 MB total), the minimal variants for pip/mamba just give you everything you need to compile / test most of the repository and come in at ~1 GB. The full variants would provide all packages for a complete environment, at the cost of more disk space (pip ~ 3 GB mamba ~ 6 GB)

I put the minimal images up at https://hub.docker.com/r/willayd/pandas-dev/tags if you'd like to try Not a goal at the moment but there *might* also be a future where instead of rebuilding a testing image for every CI run we have a pre-built docker image that we just download and run from. Might save a lot of build time I see that the pip vs mamba minimals are pretty close in size while the mamba ones have a ~1G difference.

Was the thought of providing pip vs mamba due to a size difference? If the size difference isn't significant, I would slightly favor just having the mamba environments, especially this is for scientific python development in which mamba/conda is well more equipped than pip Is that the size you see after installing locally? Might have some artifacts left over locally that I'm not aware of but the mamba full install for me was almost double the size of the pip image. 

The mamba image is also a little more complicated to deal with if you want to run pre commit. Not sure if that would even work but the pip images should Oh that's just the compressed sizes I'm seeing in https://hub.docker.com/r/willayd/pandas-dev/tags

 Ah gotcha. Yea would be curious if anyone does `docker pull willayd/pandas-dev:mamba-all` and `docker pull willayd/pandas-dev:pip-all` if you see a difference. Here's what mine yield

```sh
$ docker image list
REPOSITORY                      TAG                      IMAGE ID       CREATED         SIZE
willayd/pandas-dev              mamba-all                6336333277b7   2 hours ago     5.68GB
willayd/pandas-dev              pip-all                  b209d2a0b20b   2 days ago      2.63GB
```

There could be something simple missing from the mamba Dockerfile that would minimize that, but I think it will always use more disk space than pip We now an official pandas org set up on docker hub - updated the documentation to point to that This pull request is stale because it has been open for thirty days with no activity. Please [update](https://pandas.pydata.org/pandas-docs/stable/development/contributing.html#updating-your-pull-request) and respond to this comment if you're still interested in working on this. @WillAyd still active? also a conflict needs resolving. Closing to clear the queue, but feel free to reopen when you have time to circle back