[ussuri][goal] Add CONTRIBUTING.rst

The content links back to other guides
with information useful to contributors
of this repository.

Change-Id: I9ff35f825def76119e6964361b4912dcb36cb4c6
Story: #2007236
Task: #39555
Signed-off-by: Goutham Pacha Ravi <gouthampravi@gmail.com>
diff --git a/HACKING.rst b/HACKING.rst
index cd3c49c..da529fb 100644
--- a/HACKING.rst
+++ b/HACKING.rst
@@ -1,4 +1,6 @@
-openstack Style Commandments
-===============================================
+OpenStack Style Commandments
+============================
 
-Read the OpenStack Style Commandments https://docs.openstack.org/hacking/latest/
+Read the OpenStack Style Commandments here:
+
+    https://docs.openstack.org/hacking/latest/