add listmonk app

modules/apps/listmonk/output.tf

@@ -0,0 +1,9 @@
+output "traefik_service" {
+    value = [{
+        domain = var.domain
+        name = var.name
+        host = "${var.hostname}"
+        ip = var.vm_ip_address
+        port = 9000
+    }]
+}