高级配置

https://cloud.tencent.com/document/product/228/41737

# HTTP响应头配置
    Access-Control-Allow-Origin:    *
    Access-Control-Allow-Methods:    GET,POST,PUT,DELETE,HEAD
    Access-Control-Max-Age: 1728000        #预请求时间有效时间  20天
    Access-Control-Expose-Headers: Cache-Control,Expires,Last-Modified,Pragma,Content-Language,Content-Type   # 哪些头部可以暴露给客户端