nginx 二级路径location 用域名访问

upstream manage {  server 192.168.1.216:9085;  }server {    listen 80;    server_name a.com;    rewrite ^/$ /manage  permanent;    location ~^/ {             proxy_set_header Host $http_host;            proxy_set_header X-Forwarded-Scheme  $scheme;            proxy_set_header X-Forwarded-For $remote_addr;            proxy_set_header Upgrade $http_upgrade;            proxy_set_header Connection "upgrade";            proxy_http_version 1.1;            proxy_pass http://manage;           }    }             后端二级路径是manager