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