Apex domains cannot have CNAME records.
Question and response
Question
dig cyberfolks.hr. NS
Answer
cyberfolks.hr. 5 NS dns1.avalon.hr.
cyberfolks.hr. 5 NS dns2.avalon.hr.
Authority
The response has no authority records.
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0