生产环境配置：

1.压缩代码：

// 代码压缩
uglifyjs-webpack-plugin

2.压缩js

compression-webpack-plugin

3.压缩css

compression-webpack-plugin

4.压缩图片

image-webpack-loader

5.去除console

config.optimization.minimizer[0].options.terserOptions.compress.drop_console = true

6.去除debugger

config.optimization.minimizer[0].options.terserOptions.compress.drop_debugger = true

7.开启gzip

compression-webpack-plugin

8.配置cdn

9.公共代码抽离

10.使用cdn的vue.min.js

11.去除map文件

productionSourceMap设置为false