next.config.mjs

import createNextIntlPlugin from 'next-intl/plugin';

const withNextIntl = createNextIntlPlugin('./src/i18n/request.ts');
const isProduction = process.env.NODE_ENV === 'production';

const contentSecurityPolicy = [
  "default-src 'self'",
  "script-src 'self' 'unsafe-inline' 'unsafe-eval'",
  "style-src 'self' 'unsafe-inline'",
  "img-src 'self' data: blob: https:",
  "font-src 'self' data:",
  "connect-src 'self' https: wss:",
  "object-src 'none'",
  "base-uri 'self'",
  "form-action 'self'",
  "frame-ancestors 'none'",
  isProduction ? 'upgrade-insecure-requests' : '',
]
  .filter(Boolean)
  .join('; ');

/** @type {import('next').NextConfig} */
const nextConfig = {
  reactStrictMode: true,
  serverExternalPackages: ['@libsql/client', '@prisma/adapter-libsql', 'libsql'],
  async headers() {
    return [
      {
        source: '/:path*',
        headers: [
          { key: 'Content-Security-Policy', value: contentSecurityPolicy },
          { key: 'X-Frame-Options', value: 'DENY' },
          { key: 'X-Content-Type-Options', value: 'nosniff' },
          { key: 'Referrer-Policy', value: 'strict-origin-when-cross-origin' },
        ],
      },
    ];
  },
};

export default withNextIntl(nextConfig);