Apex domains cannot have CNAME records.
Question and response
Question
dig headquarters-salon.com. NS
Answer
headquarters-salon.com. 4 NS ns-1349.awsdns-40.org.
headquarters-salon.com. 4 NS ns-1452.awsdns-53.org.
headquarters-salon.com. 4 NS ns-1610.awsdns-09.co.uk.
headquarters-salon.com. 4 NS ns-306.awsdns-38.com.
Authority
The response has no authority records.
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0