When we updated localstack in ENG-5724, we pulled in this change. As a result comm-dev services stop stopped working because we had the wrong name for the Docker container.

1. Confirm that comm-dev services stop no longer prints the error "Error response from daemon: No such container: localstack_main"
2. Confirm that comm-dev services start following comm-dev services stop no longer prints the message "localstack is already running, skipping localstack initialization"