微应用需要支持跨域访问

遇到这样报错：Access to fetch at ‘http://localhost:3000/’ from origin ‘http://localhost:8000’ has been blocked by CORS policy: No ‘Access-Control-Allow-Origin’ header is present on the requested resource. If an opaque response serves your needs, set the request’s mode to ‘no-cors’ to fetch the resource with CORS disabled.

由于qiankun框架 解析微应用使用 import-html-entry库通过fetch请求相关资源，所以需要微应用支持跨域访问；在webpack devServer中加入以下代码即可

headers: {
　　'Access-Control-Allow-Origin': '*'
},