webpack —stats detailed 显示打包详细信息
    webpack —watch 观察者模式，实时编译
    npx webpack ，npx就是如果当前目录没有安装webpack，会去上级目录找webpack
    webpack —config ./config/webpack.config.prod.js 选择运行的配置文件
    webpack serve —config ./config/webpack.config.prod.js (serve: webpack-dev-serve)