ERROR Invalid options in vue.config.js: "baseUrl" is not allowed

报错：

 ERROR  Invalid options in vue.config.js: "baseUrl" is not allowed
npm ERR! code ELIFECYCLE
npm ERR! errno 1
npm ERR! [e-mail] serve: `vue-cli-service serve`
npm ERR! Exit status 1
npm ERR!
npm ERR! Failed at the [e-mail] serve script.
npm ERR! This is probably not a problem with npm. There is likely additional logging output above.

npm ERR! A complete log of this run can be found in:
npm ERR!     C:\Users\asd75\AppData\Roaming\npm-cache\_logs\2019-12-19T06_52_38_136Z-debug.log

 代码：

这里面是一个坑
在vue-cli.3.3版本后 baseUrl被废除了，因此这边要写成 publicPath。

解决方式：