Apex domains cannot have CNAME records.
Question and response
Question
dig warhawk.io. NS
Answer
warhawk.io. 5 NS vern.ns.cloudflare.com.
warhawk.io. 5 NS sureena.ns.cloudflare.com.
Authority
The response has no authority records.
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0