Containers don't inherit the host's /etc/hosts; the LAN resolver returns a
dead address (192.168.0.3:443) for the public names, crash-looping the
packwiz install on boot. extra_hosts host-gateway routes HTTPS through the
host's nginx (valid LE cert) -> caddy -> service.
Also add plan/10-uptime-kuma.md (Minecraft monitor: internal + public probes)
and document the HTTPS resolution variant in plan/00-overview.md.
Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>
