How to use the razzle-dev-utils/logger.warn function in razzle-dev-utils

function build(previousFileSizes) {
  // Check if razzle.config.js exists
  let razzle = {};
  try {
    razzle = require(paths.appRazzleConfig);
    /* eslint-disable no-empty */
  } catch (e) {}
  /* eslint-enable */

  if (razzle.clearConsole === false || !!razzle.host || !!razzle.port) {
    logger.warn(`Specifying options \`port\`, \`host\`, and \`clearConsole\` in razzle.config.js has been deprecated. 
Please use a .env file instead.

${razzle.host !== 'localhost' && `HOST=${razzle.host}`}
${razzle.port !== '3000' && `PORT=${razzle.port}`}
`);
  }

  // Create our production webpack configurations and pass in razzle options.
  let clientConfig = createConfig('web', 'prod', razzle, webpack);
  let serverConfig = createConfig('node', 'prod', razzle, webpack);

  process.noDeprecation = true; // turns off that loadQuery clutter.

  console.log('Creating an optimized production build...');
  console.log('Compiling client...');
  // First compile the client. We need it to properly output assets.json (asset

async function build(previousFileSizes) {
  // Check if after.config.js exists
  let after = {};
  try {
    after = require(paths.appAfterConfig);
    /* eslint-disable no-empty */
  } catch (e) {}
  /* eslint-enable */

  if (after.clearConsole === false || !!after.host || !!after.port) {
    logger.warn(`Specifying options \`port\`, \`host\`, and \`clearConsole\` in after.config.js has been deprecated. 
Please use a .env file instead.

${after.host !== 'localhost' && `HOST=${after.host}`}
${after.port !== '3000' && `PORT=${after.port}`}
`);
  }

  // Create our production webpack configurations and pass in after options.
  let clientConfig = createConfig('web', 'prod', after);
  let serverConfig = createConfig('node', 'prod', after);

  // Check if after.config has a modify function. If it does, call it on the
  // configs we just created.
  if (after.modify) {
    clientConfig = after.modify(
      clientConfig,