Unable to implement webpack in angular2

I am new to angular2 and webpack, i have installed webpack and want to minimize the size of the file using webpack, here is the webpack.config.js placed in the root folder

var HtmlWebpackPlugin = require('html-webpack-plugin');


module.exports = {
   entry: {
  app: './src/main.ts'
},
   output: {
  filename: 'bundle.js'
},
    module: {
    rules: [
      {
        test: /\.ts$/,
        loaders: [
          {
            loader: 'awesome-typescript-loader',
            options: { configFileName: helpers.root('src', 'tsconfig.json') }
          } , 'angular2-template-loader'
        ]
      }      
    ]
  },
 plugins: [
     new HtmlWebpackPlugin({
      template: 'src/index.html'
    })
  ]
};

and here is my package.json file also placed in the root folder

{
  "name": "angular-quickstart",
  "version": "1.0.0",
  "description": "QuickStart package.json from the documentation, supplemented with testing support",
  "scripts": {
    "build": "webpack --progress",
    "build:watch": "tsc -p src/ -w",
    "build:e2e": "tsc -p e2e/",
    "serve": "lite-server -c=bs-config.json",
    "serve:e2e": "lite-server -c=bs-config.e2e.json",
    "prestart": "npm run build",
    "start": "concurrently \"npm run build:watch\" \"npm run serve\"",
    "pree2e": "npm run build:e2e",
    "e2e": "concurrently \"npm run serve:e2e\" \"npm run protractor\" --kill-others --success first",
    "preprotractor": "webdriver-manager update",
    "protractor": "protractor protractor.config.js",
    "pretest": "npm run build",
    "test": "concurrently \"npm run build:watch\" \"karma start karma.conf.js\"",
    "pretest:once": "npm run build",
    "test:once": "karma start karma.conf.js --single-run",
    "lint": "tslint ./src/**/*.ts -t verbose"
  },
  "keywords": [],
  "author": "",
  "license": "MIT",
  "dependencies": {
    "@angular/common": "~2.4.0",
    "@angular/compiler": "~2.4.0",
    "@angular/core": "~2.4.0",
    "@angular/forms": "~2.4.0",
    "@angular/http": "~2.4.0",
    "@angular/platform-browser": "~2.4.0",
    "@angular/platform-browser-dynamic": "~2.4.0",
    "@angular/router": "~3.4.0",
    "angular-in-memory-web-api": "~0.2.4",
    "systemjs": "0.19.40",
    "core-js": "^2.4.1",
    "rxjs": "5.0.1",
    "zone.js": "^0.7.4"
  },
  "devDependencies": {
    "@types/jasmine": "2.5.36",
    "@types/node": "^6.0.46",
    "awesome-typescript-loader": "^3.1.2",
    "canonical-path": "0.0.2",
    "concurrently": "^3.2.0",
    "jasmine-core": "~2.4.1",
    "karma": "^1.3.0",
    "karma-chrome-launcher": "^2.0.0",
    "karma-cli": "^1.0.1",
    "karma-jasmine": "^1.0.2",
    "karma-jasmine-html-reporter": "^0.2.2",
    "lite-server": "^2.2.2",
    "lodash": "^4.16.4",
    "protractor": "~4.0.14",
    "rimraf": "^2.5.4",
    "tslint": "^3.15.1",
    "typescript": "~2.0.10",
    "webpack": "^2.2.1"
  },
  "repository": {}
}

according to the documentation all we have to do is include the command in the script property of the package.json to run the command, so i have included the script property like this

"scripts": {
    "build": "webpack --progress",
---
--
}

so that when i run the command like this npm run build it should build the project starting from the file main.ts recursively and give me an output as mentioned in the webpack.config.js but i am getting an error like this not sure what is going wrong, if anyone can provide me at least with a proper documentation material would be of great help, i am referring this documentation and it is of no help, thanks