Apex domains cannot have CNAME records.
Question and response
Question
dig eolas-services.com. NS
Answer
eolas-services.com. 5 NS ns2.eolas-services.com.
eolas-services.com. 5 NS ns1.eolas-services.com.
Authority
The response has no authority records.
Additional
ns1.eolas-services.com. 5 A 178.237.109.222
ns2.eolas-services.com. 5 A 178.237.104.222
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0