server {
  listen 4321;
  server_name _;

  root /usr/share/nginx/html;
  index index.html;

  # Static error pages generated by Astro (build.format: 'file')
  error_page 400 /400.html;
  error_page 403 /403.html;
  error_page 404 /404.html;
  error_page 408 /408.html;
  error_page 429 /429.html;
  error_page 451 /451.html;
  error_page 500 /500.html;
  error_page 502 /502.html;
  error_page 503 /503.html;
  error_page 504 /504.html;
  error_page 520 /520.html;
  error_page 521 /521.html;

  location / {
    try_files $uri $uri/ =404;
  }

  # Hashed Astro assets — cache aggressively
  location /_astro/ {
    expires 1y;
    add_header Cache-Control "public, immutable";
  }

  gzip on;
  gzip_min_length 1024;
  gzip_types text/css application/javascript image/svg+xml application/json;
}