Kind's extraPortMappings only included ports 80/443 for Caddy. Compose
service ports (RPC, gossip, UDP) were never forwarded, making them
unreachable from the host. Also adds hostNetwork/dnsPolicy to the k8s
pod spec when any compose service uses network_mode: host.
Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>