Add documentation on how to use the sample application

CONTRIBUTING.rst

@@ -43,6 +43,16 @@ django-taggit uses `tox <https://tox.readthedocs.io/>`_ to run tests:
 
     tox
 
+Running the sample application
+------------------------------
+
+There is a sample application in ``sample_taggit``. You can run it by doing the following:
+
+- Run migrations with ``sample_taggit/manage.py migrate``
+- Make yourself a superuser with ``sample_taggit/manage.py createsuperuser`` (this should let you use the admin with ease)
+- Launch the sample project itself with ``sample_taggit/manage.py runserver``
+
+
 Follow style conventions (black, flake8, isort)
 -----------------------------------------------
 

sample_taggit/templates/index.html

@@ -19,6 +19,6 @@ <h1>Sample Taggit App</h1>
       <li>(No posts yet, go to the admin to create some)</li>
       {% endfor %}
     </ul>
-    <a href="/admin">Go to admin and manage more data</a>
+      <a href="/admin">Manage data in the admin</a>
   </body>
 </html>