[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

Adding noop jobs also to merge these *.rst only changes.

Story: #2007236
Task: #38524
Change-Id: Id40407adab666a9b7591612fe0ae237aa07c9175

.zuul.yaml

@@ -51,6 +51,9 @@
     check:
       jobs:
         - heat-templates-check
+        # This is added to merge *.rst only changes
+        - noop
     gate:
       jobs:
         - heat-templates-check
+        - noop

CONTRIBUTING.rst

@@ -1,16 +1,19 @@
-If you would like to contribute to the development of OpenStack,
+The source repository for this project can be found at:
-you must follow the steps in this page:
 
-   https://docs.openstack.org/infra/manual/developers.html
+   https://opendev.org/openstack/heat-templates
 
-Once those steps have been completed, changes to OpenStack
+Pull requests submitted through GitHub are not monitored.
-should be submitted for review via the Gerrit tool, following
-the workflow documented at:
 
-   https://docs.openstack.org/infra/manual/developers.html#development-workflow
+To start contributing to OpenStack, follow the steps in the contribution guide
+to set up and use Gerrit:
 
-Pull requests submitted through GitHub will be ignored.
+   https://docs.openstack.org/contributors/code-and-documentation/quick-start.html
 
-Bugs should be filed on Storyboard, not GitHub:
+Bugs should be filed on Storyboard,:
 
    https://storyboard.openstack.org/#!/project/openstack/heat-templates
+
+For more specific information about contributing to this repository, see the
+heat-templates contributor guide:
+
+   https://opendev.org/openstack/heat-templates/src/branch/master/doc/source/contributor/contributing.rst

doc/source/contributor/contributing.rst

@@ -0,0 +1,48 @@
+============================
+So You Want to Contribute...
+============================
+For general information on contributing to OpenStack, please check out the
+`contributor guide <https://docs.openstack.org/contributors/>`_ to get started.
+It covers all the basics that are common to all OpenStack projects: the accounts
+you need, the basics of interacting with our Gerrit review system, how we
+communicate as a community, etc.
+Below will cover the more project specific information you need to get started
+with heat-templates.
+
+Communication
+~~~~~~~~~~~~~
+* IRC channel #heat at OFTC
+* Mailing list (prefix subjects with ``[heat]`` for faster responses)
+  http://lists.openstack.org/cgi-bin/mailman/listinfo/openstack-discuss
+
+Contacting the Core Team
+~~~~~~~~~~~~~~~~~~~~~~~~
+Please refer the `heat-templates Core Team
+<https://review.opendev.org/admin/groups/b4b16f97f2b8416cb0111c0bec5df885bd779347,members>`_ contacts.
+
+New Feature Planning
+~~~~~~~~~~~~~~~~~~~~
+heat-templates features are tracked on `Storyboard <https://storyboard.openstack.org/#!/project/openstack/heat>`_.
+Please specify the reported story with `heat-templates`.
+
+Task Tracking
+~~~~~~~~~~~~~
+We track our tasks in `Storyboard <https://storyboard.openstack.org/#!/project/openstack/heat>`_.
+Please specify the reported story with `heat-templates`.
+
+Reporting a Bug
+~~~~~~~~~~~~~~~
+You found an issue and want to make sure we are aware of it? You can do so on
+`Storyboard <https://storyboard.openstack.org/#!/project/openstack/heat>`_.
+Please specify the reported story with `heat-templates`.
+
+Getting Your Patch Merged
+~~~~~~~~~~~~~~~~~~~~~~~~~
+All changes proposed to the heat-templates project require one or two +2 votes
+from heat-templates core reviewers before one of the core reviewers can approve
+patch by giving ``Workflow +1`` vote.
+
+Project Team Lead Duties
+~~~~~~~~~~~~~~~~~~~~~~~~
+All common PTL duties are enumerated in the `PTL guide
+<https://docs.openstack.org/project-team-guide/ptl.html>`_.