NEXT_PUBLIC_* vars are baked in at build time, not runtime. Updated
docker.nix to use production URL and added deployment config location
to AGENTS.md.
Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>
POCKETBASE_URL was only available server-side, causing the login page
to fall back to localhost:8090 in the browser. Renamed to
NEXT_PUBLIC_POCKETBASE_URL so Next.js bundles it into client code.
Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>
