How to use webpack to create a front end and a admin? - node.js

Question

I am actually new on node.js. I am trying to create an app with admin and frontend using webpack and express. I have created an example app but now the problem is how I can create the app with the admin. Below I have shared my webpack config file
var webpack = require('webpack');
var path = require('path');
module.exports = {
entry: {
frontend: './src/index',
backend: './admin/index'
},
module: {
loaders: [
{
test: /\.js?$/, loader: 'babel', exclude: /node_modules/
},
{
test: /\.css$/,
loaders: [
'style?sourceMap',
'css?modules&importLoaders=1&localIdentName=[path]___[name]__[local]___[hash:base64:5]'
]
}
]
},
resolve: {
extensions: ['', '.js']
},
output: {
path: path.join(__dirname, '/public'),
publicPath: '/',
filename: 'bundle.js'
},
devServer: {
contentBase: './public',
hot: true
},
plugins: [
new webpack.optimize.OccurenceOrderPlugin(),
new webpack.HotModuleReplacementPlugin(),
new webpack.NoErrorsPlugin()
]
};
Webpack production configuration file
var config = require('./webpack.config.js');
var webpack = require('webpack');
config.plugins.push(
new webpack.DefinePlugin({
"process.env": {
"NODE_ENV": JSON.stringify("production")
}
})
);
config.plugins.push(
new webpack.optimize.UglifyJsPlugin({
compress: {
warnings: false
}
})
);
Is there any easy solution or what I can do now?