next.config.ts

const securityHeaders = [
  { key: "X-Frame-Options", value: "DENY" },
  { key: "X-Content-Type-Options", value: "nosniff" },
  { key: "Referrer-Policy", value: "strict-origin-when-cross-origin" },
  { key: "X-DNS-Prefetch-Control", value: "on" },
  {
    key: "Strict-Transport-Security",
    value: "max-age=63072000; includeSubDomains; preload",
  },
  // NOTE: Content-Security-Policy is set per-request in src/middleware.ts
  // (not here) so that a unique nonce can be generated for every response.
  {
    key: "Permissions-Policy",
    value: "camera=(), microphone=(), geolocation=()",
  },
];

const nextConfig = {
  serverExternalPackages: ["@opentelemetry/api"],
  async headers() {
    return [{ source: "/(.*)", headers: securityHeaders }];
  },
};

export default nextConfig;