How to restart a single container with docker-compose
The other answers to restarting a single node are on target, docker-compose restart worker. That will bounce that container, but not include any changes, even if you rebuilt it separately. You can manually stop, rm, create, and start, but there are much easier methods.
https://stackoverflow.com/questions/31466428/how-to-restart-a-single-container-with-docker-compose