flask部署中Nginx的问题

Nginx 的配置:

server {
 listen 80;
 server_name 23.145.145.241(vps的ip,我随便写的);
charset    utf-8;
access_log    /var/log/nginx/mysite.access.log    main;
error_log    /var/log/nginx/mysite.error.log    warn;
location / {
    root    /var/www/mysite;
    index    index.html index.htm;
    include uwsgi_params;
    uwsgi_pass    127.0.0.1:5000;
    uwsgi_param UWSGI_PYHOME    /var/www/mysite_venv;
    uwsgi_param UWSGI_CHDIR    /var/www/mysite;
    uwsgi_param PYTHONPATH    /var/www/mystie;
    uwsgi_param UWSGI_MODULE    run;
    uwsgi_param UWSGI_CALLABLE app;
}
}

地址栏输入ip, 访问成功!

问题是:把上面的server_name换成域名,其他不变,再访问就提示“If you see this page, the nginx web server is successfully installed and working. Further configuration is required.”
域名:阿里云买的
vps:搬瓦工
这该怎么解决呀?

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