面板下载安装好了，添加网站也好了，在浏览器中打开提示如下：
Welcome to nginx!If you see this page, the nginx web server is successfully installed and working. Further configuration is required.
For online documentation and support please refer to nginx.org.Commercial support is available at nginx.com.
Thank you for using nginx.
之前是配置好了在浏览器中能正常打开，但是过几天不用的话 打开就又是提示：Welcome to nginx!
