location / {
    proxy_set_header   X-Real-IP $remote_addr;
    proxy_set_header   Host      $host;
    proxy_pass https://127.0.0.1:9000;
    proxy_http_version 1.1;
    proxy_set_header Upgrade $http_upgrade;
    proxy_set_header Connection "upgrade";
    proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;
    proxy_set_header X-NginX-Proxy true;
  }