Update documentation

Issue-ID: NONRTRIC-535
Signed-off-by: elinuxhenrik <henrik.b.andersson@est.tech>
Change-Id: Ie87a568dafe9a0ccd0ef97dc75be600e9e40be59
diff --git a/docs/index.rst b/docs/index.rst
index 708344b..2997c40 100644
--- a/docs/index.rst
+++ b/docs/index.rst
@@ -14,6 +14,7 @@
    ./api-docs.rst
    ./use-cases.rst
    ./requirements.rst
+   ./installation-guide.rst
    ./release-notes.rst
 
 * :ref:`search`