next.config.js

const withTranspileModules = require('next-transpile-modules');
//const webpack = require('webpack');
const { loadGlobalEnvironment } = require('@sozialhelden/twelve-factor-dotenv');
const env = loadGlobalEnvironment();

let configuration = withTranspileModules({
  // Next.js doesn't transpile node_modules content by default.
  // We have to do this manually to make IE 11 users happy.
  transpileModules: [
    '@sozialhelden/twelve-factor-dotenv',
    '@elastic/apm-rum-core',
    '@elastic/apm-rum',
    'dotenv',
  ],
  webpack: config => {
    // Fixes npm packages that depend on `fs` module
    config.node = {
      fs: 'empty',
      dgram: 'empty',
      net: 'empty',
      tls: 'empty',
      child_process: 'empty',
      async_hooks: 'mock',
    };

    return config;
  },
});

// these options would be ignored above, so they needs to be extended manually
configuration = {
  ...configuration,
  productionBrowserSourceMaps: false,
  typescript: {
    // !! WARN !!
    // Dangerously allow production builds to successfully complete even if
    // your project has type errors.
    // !! WARN !!
    ignoreBuildErrors: false,
  },
  // Disabling file-system routing to always use custom server.
  // useFileSystemPublicRoutes: false,
};

module.exports = configuration;