Add support for Prometheus alerts

Change-Id: I4670610cf61b5c21b281a88741271bf7ce322b06
diff --git a/metadata/service/support.yml b/metadata/service/support.yml
index 05eaa61..ae1d2a8 100644
--- a/metadata/service/support.yml
+++ b/metadata/service/support.yml
@@ -11,3 +11,5 @@
         enabled: false
       grafana:
         enabled: false
+      prometheus:
+        enabled: true