Apex domains cannot have CNAME records.
Question and response
Question
dig fotonisoftware.fi. NS
Answer
fotonisoftware.fi. 3 NS bristol.ns.cloudflare.com.
fotonisoftware.fi. 3 NS leland.ns.cloudflare.com.
Authority
The response has no authority records.
Additional
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0