5. After the different services load up, take a moment to observe that they are all Docker type and review the default port assignments. You'll also see that "result" and "vote" services both have public generated URL hostnames because they are public-facing ports. The "db" and "redis" services are private, so they will not have hostnames. The worker doesn't require a port. For reference, these different port configurations can be found in the docker-compose.yml file in the voting app repository. Take a sec to look at it.