反向代理设置错误

nginx: [emerg] host not found in upstream "staic01.wbxcdn.com:443" in /usr/local/nginx/conf/vhost/static01.wbxcdn2.com.conf:2

配置文件：

upstream staicone {
server staic01.wbxcdn.com:443;
}
server {
listen 80;
listen 443 ssl http2;
ssl_certificate /usr/local/nginx/conf/ssl/static01.wbxcdn2.com.crt;
ssl_certificate_key /usr/local/nginx/conf/ssl/static01.wbxcdn2.com.key;
ssl_protocols TLSv1 TLSv1.1 TLSv1.2;
ssl_ciphers EECDH+CHACHA20:EECDH+AES128:RSA+AES128:EECDH+AES256:RSA+AES256:EECDH+3DES:RSA+3DES:!MD5;
ssl_prefer_server_ciphers on;
ssl_session_timeout 10m;
ssl_session_cache builtin:1000 shared:SSL:10m;
ssl_buffer_size 1400;
add_header Strict-Transport-Security max-age=15768000;
ssl_stapling on;
ssl_stapling_verify on;
server_name static01.wbxcdn2.com;
access_log off;
index index.html index.htm index.php;
include /usr/local/nginx/conf/rewrite/none.conf;
root /data/wwwroot/static01.wbxcdn2.com;
if ($ssl_protocol = "") { return 301 https://$server_name$request_uri; }

#error_page 404 = /404.html;
#error_page 502 = /502.html;

location / {
proxy_set_header X-Real-IP $remote_addr;
proxy_set_header X-Scheme $scheme;
proxy_pass https://staicone;
}
}