Add monitor web page to Health Check test

Also add documentation.

Change-Id: I4732a65d21a458711672f6f49d56d186b15bd8c8
Issue-ID: NONRTRIC-200
Signed-off-by: elinuxhenrik <henrik.b.andersson@est.tech>
diff --git a/docs/index.rst b/docs/index.rst
index d20c1ba..21469e7 100644
--- a/docs/index.rst
+++ b/docs/index.rst
@@ -15,6 +15,7 @@
    ./developer-guide.rst
    ./installation-guide.rst
    ./overview.rst
+   ./use-cases.rst
    ./release-notes.rst
 
 * :ref:`search`