Apex domains cannot have CNAME records.
Question and response
Question
dig teamdoc.cloud. NS
Answer
teamdoc.cloud. 5 NS dns12.ovh.net.
teamdoc.cloud. 5 NS ns12.ovh.net.
Authority
The response has no authority records.
Additional
ns12.ovh.net. 5 A 5.39.102.21
dns12.ovh.net. 5 A 5.135.86.81
ns12.ovh.net. 5 AAAA 2001:41d0:b00:eb00:0:0:0:2
dns12.ovh.net. 5 AAAA 2001:41d0:d00:f100:0:0:0:2
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0