README.md: add commit message style bit
@@ -59,6 +59,9 @@ We require [Developer Certificate of
Origin](https://en.wikipedia.org/wiki/Developer_Certificate_of_Origin)
`Signed-off-by` lines in commits.
+See `git log` for our commit message style. It's basically the same as
+[Go's style](https://github.com/golang/go/wiki/CommitMessage).
+
## About Us
[Tailscale](https://tailscale.com/) is primarily developed by the
