Correct the webpack.config.js example in README

Author: carlcarl

README.md

@@ -55,20 +55,22 @@ STATICFILES_DIRS = (
 <br>
 Assuming your webpack config lives at `./webpack.config.js` and looks like this
 ```javascript
+var path = require("path");
+var webpack = require('webpack');
+var BundleTracker = require('webpack-bundle-tracker');
+
 module.exports = {
  context: __dirname,
- entry: {
- app: './assets/js/index'
- output: {
- path: require('path').resolve('./assets/bundles/'),
- filename: '[name]-[hash].js',
+ entry: './assets/js/index',
+ output: {
+ path: path.resolve('./assets/bundles/'),
+ filename: "[name]-[hash].js"
  },
 
  plugins: [
  new BundleTracker({filename: './webpack-stats.json'})
  ]
 }
-
 ```