Create the production build and print the deployment instructions.
function build() {
  console.log('Creating an optimized production build...');
  webpack(config).run((err) => {
    if (err) {
      console.error('Failed to create a production build. Reason:');
      console.error(err.message || err);
      process.exit(1);
    }

    console.log(chalk.green('Compiled successfully.'));
    console.log(`The ${chalk.cyan('dist')} folder is ready to be deployed.`);
    console.log();
  });
}