Dockerize the repository

[GregConan]

Put the code into a Docker container so users don't have to get all the right versions of all the dependencies

[GregConan]

Once the repo is Dockerized, we can just import the official BIDS validator (which is itself a Docker file)

[mriedel56]

not actively being developed, but if this is of any help:
https://github.com/NBCLab/abcd_dicom2bids_docker