Adds healthcheck to LWUI Dockerfile

Change-Id: I73cb2379a8fad6b759c0cba4c4b4703c60a1e087
Signed-off-by: Benjamin Diaz <bdiaz@whitestack.com>
diff --git a/docker/light-ui/Dockerfile b/docker/light-ui/Dockerfile
index 29cbb74..bfcc9e2 100644
--- a/docker/light-ui/Dockerfile
+++ b/docker/light-ui/Dockerfile
@@ -35,4 +35,7 @@
 
 EXPOSE 80
 
+HEALTHCHECK --start-period=130s --interval=10s --timeout=5s --retries=12 \
+  CMD curl --silent --fail localhost:80 || exit 1
+
 CMD ["supervisord", "-n"]