rsnext/examples/cms-wordpress/next.config.js

if (!process.env.WORDPRESS_API_URL) {
  throw new Error(`
    Please provide a valid WordPress instance URL.
    Add to your environment variables WORDPRESS_API_URL.
  `)
}

/** @type {import('next').NextConfig} */
module.exports = {
  images: {
    domains: [
      process.env.WORDPRESS_API_URL.match(/(?!(w+)\.)\w*(?:\w+\.)+\w+/)[0], // Valid WP Image domain.
      '0.gravatar.com',
      '1.gravatar.com',
      '2.gravatar.com',
      'secure.gravatar.com',
    ],
  },
}