add lifecycle rule to the ALB listener rules

Added a Terraform lifecycle rule to the ALB listener rules to facilitate changes. This should make it possible to make changes that require the target group to be replaced. Without this, the listener rule prevents Terraform from deleting the target group.

Author: briskt

main.tf

@@ -147,6 +147,10 @@ resource "aws_alb_listener_rule" "tg" {
       values = ["${var.subdomain}.${var.domain_name}"]
     }
   }
+
+  lifecycle {
+    replace_triggered_by = [aws_alb_target_group.tg]
+  }
 }
 
 /*