server {
    listen 41737;
    server_name _;
    root /usr/share/nginx/html;
    index index.html;

    gzip on;
    gzip_types text/plain text/css application/javascript application/json image/svg+xml;
    gzip_min_length 256;

    # Share links carry capability tokens in the URL; never leak them via Referer.
    # Repeated inside locations that use add_header (nginx drops inherited headers there).
    add_header Referrer-Policy "no-referrer" always;

    location /api/ {
        proxy_pass http://backend:41738;
        proxy_http_version 1.1;
        proxy_set_header Host $host;
        proxy_set_header X-Real-IP $remote_addr;
        add_header X-Robots-Tag "noindex" always;
        add_header Referrer-Policy "no-referrer" always;
    }

    location = /index.html {
        add_header Cache-Control "no-cache";
        add_header Referrer-Policy "no-referrer" always;
        try_files $uri =404;
    }

    location /assets/ {
        expires 1y;
        add_header Cache-Control "public, immutable";
        add_header Referrer-Policy "no-referrer" always;
        try_files $uri =404;
    }

    location / {
        try_files $uri $uri/ /index.html;
    }
}