Quick fix, probably should build the resource_id using the aws_ecs_se…

…rvice so it has an implicit requirement

practicals/week06/main.tex

@@ -310,6 +310,8 @@ \subsection{[Path B] ECS}
   resource_id         = "service/taskoverflow/taskoverflow"
   scalable_dimension  = "ecs:service:DesiredCount"
   service_namespace   = "ecs"
+
+  depends_on = [ aws_ecs_service.taskoverflow ]
 }