next.config.js

const withPlugins = require('next-compose-plugins')
const optimizedImages = require('next-optimized-images')

const getLocalPackages = require('./scripts/getLocalPackages')
const localPackages = getLocalPackages.getLocalPackages()
const withTM = require('next-transpile-modules')(localPackages)

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

// 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' www.googletagmanager.com www.google-analytics.com;
  style-src 'self' 'unsafe-inline' *.googleapis.com cdn.jsdelivr.net;
  frame-src youtube.com www.youtube.com;
  img-src * blob: data:;
  media-src 'none';
  connect-src *;
  font-src 'self' fonts.gstatic.com cdn.jsdelivr.net
`

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; preload',
  },
  // https://developer.mozilla.org/en-US/docs/Web/HTTP/Headers/Feature-Policy
  {
    key: 'Permissions-Policy',
    value: 'camera=(), microphone=(), geolocation=()',
  },
]

const config = withBundleAnalyzer({
  reactStrictMode: true,
  pageExtensions: ['js', 'jsx', 'md', 'mdx'],
  eslint: {
    dirs: ['pages', 'components', 'lib', 'layouts', 'scripts'],
  },
  async headers() {
    return [
      {
        source: '/(.*)',
        headers: securityHeaders,
      },
    ]
  },
  async rewrites() {
    return [
      {
        source: '/api/:path*',
        destination: 'https://fossil-engineering-subscribe.duyet.workers.dev/:path*',
      },
    ]
  },
  images: {
    domains: ['avatars.githubusercontent.com', 'media-exp1.licdn.com'],
    disableStaticImages: true,
    loader: 'akamai',
    path: '',
  },
  exportPathMap: async function (defaultPathMap, { dev, dir, outDir, distDir, buildId }) {
    return {}
  },
  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
  },
})

module.exports = withPlugins([[withTM()], [optimizedImages, { optimizeImages: false }], config])