docs(guides): update getting-started to use ES6 syntax

Fixes #7636

Author: jashtanna007

src/content/guides/getting-started.mdx

@@ -247,9 +247,12 @@ As of version 4, webpack doesn't require any configuration, but most projects wi
 **webpack.config.js**
 
 ```javascript
-const path = require('path');
+import path from 'path';
+import { fileURLToPath } from 'url';
 
-module.exports = {
+const __dirname = path.dirname(fileURLToPath(import.meta.url));
+
+export default {
   entry: './src/index.js',
   output: {
     filename: 'main.js',