[routing] set host listen port to 4000 rather than 80

modules/stack/config.tf

@@ -85,7 +85,7 @@ resource "aws_ssm_parameter" "secret_key_base" {
 resource "aws_ssm_parameter" "port" {
   count = "${length(var.chains)}"
   name  = "/${var.prefix}/${element(keys(var.chains),count.index)}/port"
-  value = "80"
+  value = "4000"
   type  = "String"
 }
 

modules/stack/routing.tf

@@ -35,7 +35,7 @@ resource "aws_elb" "explorer" {
   }
 
   listener {
-    instance_port     = 80
+    instance_port     = 4000
     instance_protocol = "http"
     lb_port           = 80
     lb_protocol       = "http"