无法获取/纱线启动问题

Question

尝试使用纱线使用webpack设置项目

安装启动依赖项并运行yarn start之后，出现此错误

https://gyazo.com/cfefa29349a106a2cc747cb5278b86cb

这是我的webpack.config.js文件

const path = require('path');

module.exports = {
  entry: './src/index.js',
  output: {
    path: path.resolve(__dirname, 'dist'),
    filename: 'bundle.js',
    publicPath: '/'
  },
  devServer: {
    port: 4000,
    contentBase: './dist',
    hot: true,
    historyApiFallback: true
  }
}

还有package.json：

{
  "name": "datepicker",
  "version": "1.0.0",
  "description": "",
  "priavte": "true",
  "author": "",
  "license": "ISC",
  "scripts": {
    "start": "webpack-dev-server --config ./webpack.config.js --mode development"
  },
  "devDependencies": {
    "webpack": "^4.26.0",
    "webpack-cli": "^3.1.2",
    "webpack-dev-server": "^3.1.10"
  }
}

这是结构：

https://gyazo.com/25697389842a1363bc5f4e6f04c1a9c6

无法获取/有什么处理？谢谢