Update the documentation link for doc migration

Change-Id: Ie3d175b4d910f49f8a54812926131448ff1ab4d5
diff --git a/ironic_tempest_plugin/README.rst b/ironic_tempest_plugin/README.rst
new file mode 100644
index 0000000..0ea008c
--- /dev/null
+++ b/ironic_tempest_plugin/README.rst
@@ -0,0 +1,18 @@
+=======================================
+Tempest Integration of ironic-inspector
+=======================================
+
+This directory contains Tempest tests to cover the ironic-inspector project.
+
+It uses tempest plugin to automatically load these tests into tempest. More
+information about tempest plugin could be found here:
+`Plugin <https://docs.openstack.org/tempest/latest/plugin.html>`_
+
+The legacy method of running Tempest is to just treat the Tempest source code
+as a python unittest:
+`Run tests <https://docs.openstack.org/tempest/latest/overview.html#legacy-run-method>`_
+
+There is also tox configuration for tempest, use following regex for running
+introspection tests::
+
+    $ tox -e all-plugin -- inspector_tempest_plugin