cssd-back/node_modules/webpack-dev-server/client/webpack.config.js

'use strict';

module.exports = {
  mode: 'production',
  module: {
    rules: [{
      test: /\.js$/,
      exclude: /node_modules|web_modules/,
      use: [{
        loader: 'babel-loader'
      }]
    }]
  }
};