[ussuri][goal] Update contributor documentation
This patch updates/adds the contributor documentation to follow
the guidelines of the Ussuri cycle community goal[1].
[1] https://governance.openstack.org/tc/goals/selected/ussuri/project-ptl-and-contrib-docs.html
Story: #2007236
Task: #38554
Change-Id: I289f4638ade76651a0d13cc0c0786f8f5fc81bd4
diff --git a/CONTRIBUTING.rst b/CONTRIBUTING.rst
new file mode 100644
index 0000000..a138d66
--- /dev/null
+++ b/CONTRIBUTING.rst
@@ -0,0 +1,19 @@
+The source repository for this project can be found at:
+
+ https://opendev.org/openstack/patrole
+
+Pull requests submitted through GitHub are not monitored.
+
+To start contributing to OpenStack, follow the steps in the contribution guide
+to set up and use Gerrit:
+
+ https://docs.openstack.org/contributors/code-and-documentation/quick-start.html
+
+Bugs should be filed on Storyboard:
+
+ https://storyboard.openstack.org/#!/project/1040
+
+For more specific information about contributing to this repository, see the
+Patrole contributor guide:
+
+ https://docs.openstack.org/patrole/latest/contributor/contributing.html