next.js/examples/with-electron/renderer/next.config.js

module.exports = {
  webpack (config, { dev }) {
    config.target = 'electron-renderer'
    return config
  },
  exportPathMap () {
    // Let Next.js know where to find the entry page
    // when it's exporting the static bundle for the use
    // in the production version of your app
    return {
      '/start': { page: '/start' }
    }
  }
}