Small traefik cleanup

Remove fallback DNS since we only care about internal DNS

Use loopback address for accessing Nomad UI

core/traefik/traefik.nomad

@@ -44,7 +44,6 @@ job "traefik" {
           "192.168.2.101",
           "192.168.2.102",
           "192.168.2.30",
-          "192.168.2.170",
         ]
       }
     }
@@ -160,7 +159,7 @@ job "traefik" {
   exposedByDefault = false
   defaultRule = "Host(`{{normalize .Name}}.<< with nomadVar "nomad/jobs" >><< .base_hostname >><< end >>`)"
   [providers.nomad.endpoint]
-  address = "http://<< env "attr.unique.network.ip-address" >>:4646"
+  address = "http://127.0.0.1:4646"
         EOH
         destination = "${NOMAD_TASK_DIR}/config/traefik.toml"
       }