DiscoverService searches for services with the given type and returns all its instances.

DnsSDScan scans zeroconf publications on local domain The zeroconf library does not support browsing of all services, but a workaround is to search the service types with "_services._dns-sd._udp" then query each of the service types.

LocateHub determines the nats URL to use.

ServeDiscovery publishes a service for discovery.