docs(esnext-webpack): add a note about Easy Webpack docs

Author: niieani

skeleton-esnext-webpack/webpack.config.js

@@ -1,5 +1,10 @@
 "use strict";
 require('regenerator-runtime/runtime');
+
+/**
+ * To learn more about how to use Easy Webpack
+ * Take a look at the README here: https://github.com/easy-webpack/core
+ **/
 const easyWebpack = require('@easy-webpack/core');
 const generateConfig = easyWebpack.default;
 const get = easyWebpack.get;
@@ -169,4 +174,4 @@ if (ENV === 'test') {
   );
 }
 
-module.exports = config;
+module.exports = config;