Initial Git Tips documentation for contributors

[vorburger]

@jingtang10 the other day in the meeting you suggested "sharing git know how" - here's a start, is this useful?

@omarismail94 and @fredhersch FYI

[jingtang10]

@vorburger can you possibly incorporate the single-commit per review round point in bashir's doc: https://github.com/google/fhir-data-pipes/blob/master/doc/review_process.md? it's a great set of rules by the way we probably should incorporate most/all of them.

[vorburger]

@vorburger can you possibly incorporate the single-commit per review round point in bashir's doc: https://github.com/google/fhir-data-pipes/blob/master/doc/review_process.md? it's a great set of rules by the way we probably should incorporate most/all of them.

Done! Just pushed, plz have another look - better, like this? Merge?

[jingtang10]

thanks for writing these tips Michael! I recognise this is of huge value to developers - and I'm also ok for us to iterate on this instead of dragging this out.

approved and fix/merge as you see fit. thanks!