Describe workflow.
Describe workflow.

First pass at documenting the PR/CI process.

ryanlovett/datahub,ryanlovett/datahub,gunjanbaid/datahub,berkeley-dsep-infra/datahub,ryanlovett/datahub,berkeley-dsep-infra/datahub,berkeley-dsep-infra/datahub,gunjanbaid/datahub