Docker images with different Python versions

The tags in Docker Hub Pytorch are not explicit in their Python versioning. I assume they are all Python 3.7. Would it be possible to build images for every minor version from Python 3.7 and up? Not sure about the patches, build for every patch?

There is also a lack of explanatory text in the main page. Please add this also.

Not ideal but the information is here https://github.com/pytorch/pytorch/blob/master/.circleci/docker/build.sh#L78

cc: @malfet