Apex domains cannot have CNAME records.
Question and response
Question
dig confidently.fi. NS
Answer
confidently.fi. 4 NS ns-836.awsdns-40.net.
confidently.fi. 4 NS ns-1222.awsdns-24.org.
confidently.fi. 4 NS ns-1676.awsdns-17.co.uk.
confidently.fi. 4 NS ns-173.awsdns-21.com.
Authority
The response has no authority records.
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0