nginx 配置求助，我想实现类似访问{a}.xxx.yyy.com 转发到{a}.somequery.somequery.com,配置在正文，访问 502 呢，不知道问题出在哪儿

server { listen 80; #listen [::]:80; server_name ~^(?<domain>.+)\.xxx\.yyy\.com$; location / { proxy_redirect off; # proxy_set_header Accept-Encoding gzip; proxy_set_header Host $domain.somequery.somequery.com; proxy_set_header X-Real-IP $remote_addr; proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for; proxy_pass http://$domain.somequery.somequery.com; } access_log /home/wwwlogs/xxx.yyy.com.log; } 

大佬们看看，先行谢过