trying out your repo, but there appears to be a worker process

hello,
i am going through your repo, but when i did a docker-compose up on the docker-compose.test.yml, there is a reference called worker, but the worker folder does not exist.

is there supposed to be a worker service or not?

https://github.com/alexellis/aspnet-voteservice/blob/946305e3c8cb192228ff01a43181f0b82beb8e5f/result/docker-compose.test.yml#L10