Only the marketing site and the customer portal are public; /admin and the
Proxmox hosts stay on the private network. nginx was a single server_name _
catch-all, so /admin was served on all four dev domains.
Two layers:
- nginx denies /admin on the known-public hostnames before PHP is reached
(denylist, so an allowlist typo cannot lock the operators out).
- ADMIN_HOSTS is now populated, making the app layer a strict allowlist that
also covers /livewire/update, which nginx cannot attribute to /admin.
Verified live against the running stack: /admin is 404 on www/app/api/ws and on
any unlisted host, 302->login on admin.dev / the private IP / localhost, while
/ and /dashboard stay reachable everywhere.
Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>
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