Apex domains cannot have CNAME records.
Question and response
Question
dig moulin-vin.com. NS
Answer
moulin-vin.com. 5 NS ns-655.awsdns-17.net.
moulin-vin.com. 5 NS ns-1335.awsdns-38.org.
moulin-vin.com. 5 NS ns-1235.awsdns-26.org.
moulin-vin.com. 5 NS ns-1729.awsdns-24.co.uk.
Authority
The response has no authority records.
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0