added design section and deployment for cloud native smf amf

Change-Id: I8daa75db0ceb8de3e26f203837c38c6abd1ba9b9
diff --git a/index.rst b/index.rst
index f72e63a..f8825b0 100644
--- a/index.rst
+++ b/index.rst
@@ -83,6 +83,15 @@
    deployment/deploymentupf.rst
 
 .. toctree::
+   :maxdepth: 2
+   :caption: Design
+   :hidden:
+   :glob:
+
+   design/design-smf.rst
+   design/design-amf.rst
+
+.. toctree::
    :maxdepth: 3
    :caption: Test Automation
    :hidden: