[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/README.rst b/README.rst
index de0ec32..cf2f7fb 100644
--- a/README.rst
+++ b/README.rst
@@ -2,9 +2,10 @@
 manila-tempest-plugin
 =====================
 
-Tempest plugin manila-tempest-plugin
+This repository contains a `Tempest`_ `test plugin`_ to verify the
+functionality of the `OpenStack Shared File System Service`_, Manila.
 
-Tempest plugin to test Manila's features
+See `contributor information`_ to learn more.
 
 * Free software: Apache license
 * Documentation: https://docs.openstack.org/manila/latest/
@@ -12,7 +13,7 @@
 * Source: https://opendev.org/openstack/manila-tempest-plugin
 * Bugs: https://bugs.launchpad.net/manila
 
-Features
---------
-
-* TODO
+.. _Tempest: https://docs.openstack.org/tempest
+.. _test plugin: https://docs.openstack.org/tempest/latest/plugin.html
+.. _contributor information: CONTRIBUTING.rst
+.. _OpenStack Shared File System Service: https://docs.openstack.org/manila
\ No newline at end of file