Adds healthcheck to MON Dockerfile

The healthcheck checks connection to Kafka, Prometheus exporter and processes
running.

Signed-off-by: Benjamin Diaz <bdiaz@whitestack.com>
Change-Id: Ibc94a8ad0687ffa3199ba1a845e3730814d9a52f
diff --git a/docker/MON/Dockerfile b/docker/MON/Dockerfile
index c276000..6fb35cc 100644
--- a/docker/MON/Dockerfile
+++ b/docker/MON/Dockerfile
@@ -62,6 +62,9 @@
 ENV OSMMON_VCA_SECRET secret
 ENV OSMMON_VCA_USER admin
 
-EXPOSE 8662 8000
+EXPOSE 8000
+
+HEALTHCHECK --interval=5s --timeout=2s --retries=12 \
+  CMD osm-mon-healthcheck || exit 1
 
 CMD /bin/bash scripts/runInstall.sh