location / {
      proxy_set_header Host $host;
      proxy_set_header  X-Real-IP        $remote_addr;
      proxy_set_header  X-Forwarded-For  $proxy_add_x_forwarded_for;
      proxy_pass http://{IP}:{PORT};
    }

另外，宝塔上设置的default_type 默认是文件下载。我常自己改成

default_type text/html;