DNS Caching Issue For community version

[RT.Nat]

Troubled up in DNS caching of the IP address for a given DNS name. 

Adding the solution given below does not solve the problem of DNS caching in
NGINX.

resolver 8.8.8.8;
set $upstream_endpoint https://example.net:8080;
location / {
    proxy_pass $upstream_endpoint;
}

Is there any solutions?

Posted at Nginx Forum: https://forum.nginx.org/read.php?2,266857,266857#msg-266857