Enable Prometheus support

This change adds alerts on API status and log metrics.

Change-Id: I2fe6ae3683a2e715ea9f5d4d197149284bfb75f5
diff --git a/metadata/service/support.yml b/metadata/service/support.yml
index 2c762b0..949d7cc 100644
--- a/metadata/service/support.yml
+++ b/metadata/service/support.yml
@@ -15,3 +15,5 @@
         enabled: true
       telegraf:
         enabled: true
+      prometheus:
+        enabled: true