Repo Preparation for MBO

[ThatGuyLLC]

This repo has been marked as core tech and is part of initiative of repo preparation, part of this includes adding needed missing documentation.
This repo in particular needs:

• Explain how to make a contribution (Contributing MD)
  Example: https://github.com/input-output-hk/ouroboros-network/blob/master/CONTRIBUTING.md

[coot]

Can I ask the maintainer to add this issue to this project / view.