location / {
           proxy_pass http://127.0.0.1:8090;
           proxy_set_header  Host  $host:$server_port;  #有时候页面内局部URL丢失端口就这样写
           proxy_set_header X-Real-IP $remote_addr;
           proxy_set_header X-Forwarded-Port $server_port;
           #proxy_redirect off;
           proxy_set_header X-Forwarded-Proto  $scheme;
           add_header Access-Control-Allow-Origin *;
           add_header Access-Control-Allow-Methods 'GET, POST, OPTIONS';
           add_header Access-Control-Allow-Headers 'DNT,X-Mx-ReqToken,Keep-Alive,User-Agent,X-Requested-With,If-Modified-Since,Cache-Control,Content-Type,Authorization';
           #所有连接都升级为HTTPS
           add_header Content-Security-Policy upgrade-insecure-requests;

        }