Add ability to configure policy file

Related: PROD-33994
Related: PROD-31956

Change-Id: I84458da9fea585fb036d65fcd3ef8e443ecd20ad
diff --git a/README.rst b/README.rst
index 6c9c9e4..4bae229 100644
--- a/README.rst
+++ b/README.rst
@@ -287,6 +287,19 @@
             admin_password: password
             admin_tenant_name: tenant1
 
+Change default service policy configuration
+===========================================
+
+.. code-block:: yaml
+
+    designate:
+      server:
+        policy:
+          admin: 'role:admin'
+          primary_zone: 'target.zone_type:PRIMARY'
+          # Add key without value to remove line from policy.json
+          get_quotas:
+
 Upgrades
 ========