Update HV-VES documentation - metrics

Update of documentation to cover metrics provided with use
of Prometheus library.

Change-Id: Ib81208ce80a3bfb4000781be84d1465731055551
Issue-ID: DCAEGEN2-1046
Signed-off-by: kjaniak <kornel.janiak@nokia.com>
diff --git a/docs/sections/services/ves-hv/index.rst b/docs/sections/services/ves-hv/index.rst
index 5cfaed3..5bb83dd 100644
--- a/docs/sections/services/ves-hv/index.rst
+++ b/docs/sections/services/ves-hv/index.rst
@@ -36,3 +36,4 @@
     HV-VES Offered APIs <../../apis/ves-hv/index>
     authorization
     example-event
+    healthcheck-and-monitoring