Apex domains cannot have CNAME records.
Question and response
Question
dig mc2.dev. NS
Answer
mc2.dev. 5 NS ns2.mc2.dev.
mc2.dev. 5 NS ns1.mc2.dev.
Authority
The response has no authority records.
Additional
ns1.mc2.dev. 5 A 193.46.84.152
ns2.mc2.dev. 5 A 157.90.223.112
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0