您需要添加以下行：

proxy_set_header X-Forwarded-Proto https;

proxy_set_header X-Forwarded-Proto https;

在

location / {
      proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;
      proxy_set_header Host $http_host;
      proxy_set_header X-Forwarded-Proto https;
      proxy_redirect off;

      if (!-f $request_filename) {
        proxy_pass http://upstreamy;
        break;
      }
 }