server {
    listen 80;
    server_name _;

    # Public interface - requires API key
    location / {
        proxy_pass http://127.0.0.1:8080;
        proxy_set_header Host $host;
        proxy_set_header X-Real-IP $remote_addr;
        proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;
        proxy_set_header X-Forwarded-Proto $scheme;
        
        # Require API key via query param or header
        if ($http_x_api_key != '5bafc47c0f60b3fa5e5c7d1e9a3f1b2d4c6e8a1b3d5f7a9c2e4d6b8f1a3c5d7e') {
            return 401;
        }
    }
}