next.config.mjs

import withBundleAnalyzer from "@next/bundle-analyzer";

const withBundle = withBundleAnalyzer({
 enabled: process.env.ANALYZE === "true",
});

const nextConfig = {
 reactStrictMode: true,
 pageExtensions: ["mdx", "md", "jsx", "js"],
 poweredByHeader: false,
 eslint: {
  ignoreDuringBuilds: true,
 },
 headers() {
  return [
   {
    source: "/(.*)",
    headers: [
     {
      key: "Referrer-Policy",
      value: "no-referrer",
     },
     {
      key: "X-Content-Type-Options",
      value: "nosniff",
     },
     {
      key: "X-DNS-Prefetch-Control",
      value: "on",
     },
     {
      key: "X-Frame-Options",
      value: "SAMEORIGIN",
     },
     {
      key: "Strict-Transport-Security",
      value: "max-age=31536000; includeSubDomains; preload",
     },
     {
      key: "Cache-Control",
      value: "public, max-age=21600, must-revalidate",
     },
     {
      key: "X-XSS-Protection",
      value: "1; mode=block",
     },
     {
      key: "Permissions-Policy",
      value: "camera=(), microphone=(), geolocation=()",
     },
    ],
   },
   {
    source: "/(.*).xml",
    headers: [
     {
      key: "Content-Type",
      value: "application/xml",
     },
    ],
   },
  ];
 },
};

const createConfig = () => {
 const plugins = [withBundle];
 const config = plugins.reduce((acc, next) => next(acc), {
  ...nextConfig,
 });
 return config;
};

export default createConfig;