Add Prometheus alerts

Change-Id: Iff9f8f89eac0ebb28b319efe978f294630a40c76
Depends-On: I5b4e72584b41b7a9b480b4343f30b7a6efd83c99
diff --git a/metadata/service/support.yml b/metadata/service/support.yml
index ee4398e..19559e7 100644
--- a/metadata/service/support.yml
+++ b/metadata/service/support.yml
@@ -15,3 +15,5 @@
         enabled: true
       telegraf:
         enabled: true
+      prometheus:
+        enabled: true