If file is not found when replying it uses body but it would be nice to return 404 whenever the body part is not placed/defined in yml control file. Sample control yml part related to question ```yaml - request: url: ^/api/prod/(\d*)$ method: GET response: status: 200 file: data/api/prod/<% url[1] %>.json ```` Would this proposal be something useful or does it have a way to config this way already?