server {
    listen 8080;
    server_name _;
    root /usr/share/nginx/html;

    # Liveness/readiness for k8s probes.
    location = /healthz {
        access_log off;
        default_type text/plain;
        return 200 "ok\n";
    }

    # Runtime config, written at container start; never cache.
    location = /config.js {
        add_header Cache-Control "no-store" always;
    }

    # Hashed build assets: cache forever; a missing asset is a real 404.
    location /assets/ {
        add_header Cache-Control "public, max-age=31536000, immutable" always;
        try_files $uri =404;
    }

    location = /index.html {
        add_header Cache-Control "no-cache" always;
    }

    # SPA fallback: unknown paths get index.html; the router handles them.
    location / {
        try_files $uri /index.html;
    }
}