环境：仓库使用nginx反向代理harbor，由于私服的公网ip不支持443、80等常见端口，故使用特殊端口对外网暴露

问题1：在docker push时，报错“The plain HTTP request was sent to HTTPS port”

问题2：在docker push时，报错“dial tcp x.x.x.x:443: i/o timeout”

解决方案：nginx反向代理配置中，增加如下配置：

proxy_set_header  Host              $http_host;   # required for docker client's sake
proxy_set_header  X-Real-IP         $remote_addr; # pass on real client's IP
proxy_set_header  X-Forwarded-For   $proxy_add_x_forwarded_for;
proxy_set_header  X-Forwarded-Proto $scheme;