tailwind-nextjs-blog/next.config.js

const withBundleAnalyzer = require('@next/bundle-analyzer')({
  enabled: process.env.ANALYZE === 'true',
});
const withExportImages = require('next-export-optimize-images');

// You might need to insert additional domains in script-src if you are using external services
const ContentSecurityPolicy = `
  default-src 'self';
  script-src 'self' 'unsafe-eval' 'unsafe-inline' giscus.app comment.ivanli.cc localhost:8080;
  style-src 'self' 'unsafe-inline' comment.ivanli.cc localhost:8080;
  img-src * blob: data:;
  media-src 'none';
  connect-src *;
  font-src 'self' comment.ivanli.cc localhost:8080;
  frame-src giscus.app
`;

const securityHeaders = [
  // https://developer.mozilla.org/en-US/docs/Web/HTTP/CSP
  {
    key: 'Content-Security-Policy',
    value: ContentSecurityPolicy.replace(/\n/g, ''),
  },
  // https://developer.mozilla.org/en-US/docs/Web/HTTP/Headers/Referrer-Policy
  {
    key: 'Referrer-Policy',
    value: 'strict-origin-when-cross-origin',
  },
  // https://developer.mozilla.org/en-US/docs/Web/HTTP/Headers/X-Frame-Options
  {
    key: 'X-Frame-Options',
    value: 'DENY',
  },
  // https://developer.mozilla.org/en-US/docs/Web/HTTP/Headers/X-Content-Type-Options
  {
    key: 'X-Content-Type-Options',
    value: 'nosniff',
  },
  // https://developer.mozilla.org/en-US/docs/Web/HTTP/Headers/X-DNS-Prefetch-Control
  {
    key: 'X-DNS-Prefetch-Control',
    value: 'on',
  },
  // https://developer.mozilla.org/en-US/docs/Web/HTTP/Headers/Strict-Transport-Security
  {
    key: 'Strict-Transport-Security',
    value: 'max-age=31536000; includeSubDomains',
  },
  // https://developer.mozilla.org/en-US/docs/Web/HTTP/Headers/Feature-Policy
  {
    key: 'Permissions-Policy',
    value: 'camera=(), microphone=(), geolocation=()',
  },
];

/**
 * @type {import('next/dist/next-server/server/config').NextConfig}
 **/
module.exports = withExportImages(
  withBundleAnalyzer({
    reactStrictMode: true,
    pageExtensions: ['ts', 'tsx', 'js', 'jsx', 'md', 'mdx'],
    eslint: {
      dirs: ['pages', 'components', 'lib', 'layouts', 'scripts'],
    },
    images: {
      domains: ['pan.ivanli.cc', 'i.creativecommons.org'],
    },
    async headers() {
      return [
        {
          source: '/(.*)',
          headers: securityHeaders,
        },
      ];
    },
    webpack: (config, { dev, isServer }) => {
      config.module.rules.push({
        test: /\.(png|jpe?g|gif|mp4)$/i,
        use: [
          {
            loader: 'file-loader',
            options: {
              publicPath: '/_next',
              name: 'static/media/[name].[hash].[ext]',
            },
          },
        ],
      });

      config.module.rules.push({
        test: /\.svg$/,
        use: ['@svgr/webpack'],
      });

      if (!dev && !isServer) {
        // Replace React with Preact only in client production build
        Object.assign(config.resolve.alias, {
          'react/jsx-runtime.js': 'preact/compat/jsx-runtime',
          react: 'preact/compat',
          'react-dom/test-utils': 'preact/test-utils',
          'react-dom': 'preact/compat',
        });
      }

      return config;
    },
    trailingSlash: true,
  })
);