Add expose path for blocky /metrics

Not sure if it's needed

services/backups/backup.nomad

@@ -57,6 +57,16 @@ job "backup%{ if batch_node != null }-oneoff-${batch_node}%{ endif }" {
           proxy {
             local_service_port = 8080
 
+            # TODO: Do I need this?
+            expose {
+              path {
+                path = "/metrics"
+                protocol = "http"
+                local_path_port = 8080
+                listener_port = "metrics"
+              }
+            }
+
             upstreams {
               destination_name = "mysql-server"
               local_bind_port = 6060