我按照关于 pluralsight 的教程使用 gitbash 通过 github 克隆了这个 Webpack Starter 包。我正在尝试通过 Visual Studio Code 的集成终端访问 webpack，但出现以下错误。我是新手，所以请帮助我。
我正在运行命令
Raza Zaidi@RazaZaidi-PC MINGW64 ~/webpack-starter (master)
$ npm run dev
然后发生以下错误
> yet-another-webpack-es6-starterkit@1.0.0 dev C:\Users\Raza Zaidi\webpack-starter
> webpack-dev-server --open --config webpack/webpack.config.dev.js
'webpack-dev-server' is not recognized as an internal or external command,
operable program or batch file.
npm ERR! code ELIFECYCLE
npm ERR! errno 1
npm ERR! yet-another-webpack-es6-starterkit@1.0.0 dev: `webpack-dev-server --open --config webpack/webpack.config.dev.js`
npm ERR! Exit status 1
npm ERR!
npm ERR! Failed at the yet-another-webpack-es6-starterkit@1.0.0 …