/** @type {import('next').NextConfig} */
const nextConfig = {
  output: "export",       // Static HTML export — served via nginx/CDN
  reactStrictMode: true,  // Enables strict mode to catch bugs early
  trailingSlash: true,

  images: {
    unoptimized: true,    // Required for static export (no Next.js image server)
  },

  // NOTE: async headers() is NOT supported with output:"export"
  // Cache-Control headers must be set at the web server level (nginx/Apache/CDN).
  // Recommended nginx config for production:
  //   location ~* \.(html)$ { add_header Cache-Control "public, max-age=0, must-revalidate"; }
  //   location ~* \.(js|css|woff2|webp|png|jpg|svg)$ { add_header Cache-Control "public, max-age=31536000, immutable"; }
};

module.exports = nextConfig;