add cloudflare dns code example
Example: cloudflare dns
IPv4
1.1.1.1
1.0.0.1
IPv6
2606:4700:4700::1111
2606:4700:4700::1001
Android 9 Pie and above
one.one.one.one
1dot1dot1dot1.cloudflare-dns.com
IPv4
1.1.1.1
1.0.0.1
IPv6
2606:4700:4700::1111
2606:4700:4700::1001
Android 9 Pie and above
one.one.one.one
1dot1dot1dot1.cloudflare-dns.com