Create new pipelines for Docker container builds

[karlhigley]

• Publish library versions as JSON for documentation #388

[mikemckiernan]

As long as the library versions are available from pip or by importing the library and printing the version it'll be OK. If there are grander ideas, I'm game to pitch in.

For pip, the check is python -m pip show library-name. For other libraries, it's python -c 'import library-name as x; print(x.__version__);

[karlhigley]

They should be, so I'm not sure if we need to do anything specific here, but wanted to make sure we didn't miss adding a crucial step to the new pipelines (if necessary.)