Apex domains cannot have CNAME records.
Question and response
Question
dig digistark.digital. NS
Answer
digistark.digital. 5 NS ns-1164.awsdns-17.org.
digistark.digital. 5 NS ns-1317.awsdns-36.org.
digistark.digital. 5 NS ns-155.awsdns-19.com.
digistark.digital. 5 NS ns-817.awsdns-38.net.
Authority
The response has no authority records.
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0