next.config.js

const ContentSecurityPolicy = `
  default-src 'self';
  script-src 'self' 'unsafe-eval' 'unsafe-inline' *.mikeroph.one;
  style-src 'self' 'unsafe-inline' *.googleapis.com;
  img-src * blob: data:;
  media-src 'none';
  connect-src *;
  font-src 'self' fonts.gstatic.com;
`;

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
  // Opt-out of Google FLoC: https://amifloced.org/
  {
    key: 'Permissions-Policy',
    value: 'camera=(), microphone=(), geolocation=(), interest-cohort=()',
  },
];

const themeColors = [
  'red',
  'orange',
  'yellow',
  'green',
  'teal',
  'blue',
  'cyan',
  'pink',
  'gray',
  'purple',
];

module.exports = {
  webpack5: true,
  images: {
    domains: ['image.tmdb.org'],
  },
  env: {
    NEXT_PUBLIC_APP_URI: process.env.NEXT_PUBLIC_APP_URI,
    ALLOWED_USERS: process.env.ALLOWED_USERS,
    NEXTAUTH_URL: process.env.NEXTAUTH_URL,
    OWNER_ID: process.env.OWNER_ID,
    COLOR_THEME:
      process.env.COLOR_THEME &&
      !themeColors.includes(process.env.COLOR_THEME.toLowerCase())
        ? 'purple'
        : process.env.COLOR_THEME
        ? process.env.COLOR_THEME.toLowerCase()
        : 'purple',
  },
  async headers() {
    return [
      {
        source: '/(.*)',
        headers: securityHeaders,
      },
    ];
  },
};