[VOL-4089] updated lab setup documentation

Change-Id: I2c6e3c3216aae416d630bcf624fdd175178ca1fe
diff --git a/index.rst b/index.rst
index b4bce27..517b626 100644
--- a/index.rst
+++ b/index.rst
@@ -59,6 +59,7 @@
    Deploy VOLTHA <voltha-helm-charts/README.md>
    overview/workflows.rst
    overview/operate.rst
+   overview/lab_setup.rst
    overview/troubleshooting.rst
 
 .. toctree::