next.config.js

/** @type {import('next').NextConfig} */
const nextConfig = {
  reactStrictMode: true,
  experimental: {
    swcPlugins: [
      [
        'next-superjson-plugin',
        {
          excluded: [],
        },
      ],
    ],
  },
  headers: () => {
    return Promise.resolve([
      {
        source: '/(.*)',
        headers: securityHeaders,
      },
    ]);
  },
  webpack: (config, { isServer }) => {
    // ignore fs and path when building for browser, resolves "fs" is not defined error
    if (!isServer) {
      config.resolve.fallback = {
        fs: false,
        path: false,
      };
    }

    return config;
  },
  output: 'standalone',
  eslint: {
    ignoreDuringBuilds: true,
  },
};

// https://nextjs.org/docs/advanced-features/security-headers
const ContentSecurityPolicy = `
    default-src 'self' analytics.umami.is;
    script-src 'self' 'unsafe-eval' 'unsafe-inline' analytics.umami.is;
    style-src 'self' 'unsafe-inline';
    img-src * blob: data:;
    media-src 'none';
    connect-src *;
    font-src 'self';
`;

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

module.exports = withBundleAnalyzer(
  require('next-contentlayer').withContentlayer(nextConfig),
);