Add traefik v1 prometheus metrics configuration

app/config/configuration/traefik/traefik.toml

@@ -43,3 +43,12 @@ entrypoint = "admin"
   prefix = "traefik"
   domain = "web.deuxfleurs.fr"
   exposedByDefault = false
+
+[metrics]
+  [metrics.prometheus]
+    # -- below is for traefik 1.7 see https://doc.traefik.io/traefik/v1.7/configuration/metrics/
+    entryPoint = "metrics" # default to "/traefik"
+    buckets = [0.1,0.3,1.2,5.0] # default buckets
+    # -- options below seem to ONLY be for traefik v2
+    # addServicesLabels = true
+    # addEntryPointsLabels = true