articles: Add ground rules from Chrome's DEI book club

This should make them easier to refer to when setting ground rules for
the Git inclusion summit.

Signed-off-by: Jonathan Nieder <jrnieder@gmail.com>
Change-Id: Ib32aa1075ca17bd641f0052d2f7eb53fdfa82e99
2 files changed
tree: 2926f461c371c012025a7a9e9320a475870cb4ee
  1. LICENSE
  2. ground-rules.md
  3. index.md