server {
    listen 8081;
    server_name localhost;
    server_tokens off;

    root /usr/share/nginx/html;

    # Compression
    gzip on;
    gzip_types text/css application/javascript application/json image/svg+xml;

    # Security headers
    add_header X-Content-Type-Options "nosniff" always;
    add_header Referrer-Policy "strict-origin-when-cross-origin" always;

    # Never serve dotfiles (.git, .dockerignore, ...)
    location ~ /\. {
        deny all;
    }

    # Images and PDFs rarely change. HTML, JS, CSS and JSON are not fingerprinted,
    # so they keep nginx's default (ETag / Last-Modified revalidation).
    location ~* \.(jpg|png|pdf)$ {
        expires 30d;
    }
}