[DOC-23]Initial structure and Documentation Guide

Change-Id: Ie0fdb7be60acd79b878c2d9b985aaaf6aca035d2
Signed-off-by: Rich Bennett <rb2745@att.com>
diff --git a/docs/index.rst b/docs/index.rst
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+.. This work is licensed under a Creative Commons Attribution 4.0 International License.
+
+Welcome to ONAP documentation!
+================================
+
+Contents:
+
+.. toctree::
+   :maxdepth: 1
+
+   release/index
+   how-to-use-docs/index
+
+Indices and tables
+==================
+
+* :ref:`genindex`
+* :ref:`modindex`
+* :ref:`search`
+