Apex domains cannot have CNAME records.
Question and response
Question
dig abat-jours.shop. NS
Answer
abat-jours.shop. 5 NS ns-1118.awsdns-11.org.
abat-jours.shop. 5 NS ns-205.awsdns-25.com.
abat-jours.shop. 5 NS ns-100.awsdns-12.com.
abat-jours.shop. 5 NS ns-409.awsdns-51.com.
Authority
The response has no authority records.
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0