Apex domains cannot have CNAME records.
Question and response
Question
dig artifactoids.com. NS
Answer
artifactoids.com. 5 NS ns-1881.awsdns-43.co.uk.
artifactoids.com. 5 NS ns-1543.awsdns-00.co.uk.
artifactoids.com. 5 NS ns-307.awsdns-38.com.
artifactoids.com. 5 NS ns-876.awsdns-45.net.
Authority
The response has no authority records.
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0