Make traefik a service rather than a system job

Sets it up to support auto_revert and auto_promote

nomad/traefik/traefik.nomad

@@ -6,7 +6,7 @@ variable "base_hostname" {
 
 job "traefik" {
   datacenters = ["dc1"]
-  type = "system"
+  type = "service"
   priority = 100
 
   constraint {
@@ -14,12 +14,19 @@ job "traefik" {
     value = "ingress"
   }
 
+  constraint {
+    distinct_hosts = true
+  }
+
   update {
     max_parallel = 1
+    # canary = 1
+    # auto_promote = true
     auto_revert = true
   }
 
   group "traefik" {
+    count = 1
 
     network  {
       port "web" {