Apex domains cannot have CNAME records.
Question and response
Question
dig hostchocolate.com. NS
Answer
hostchocolate.com. 5 NS ns3.hostchocolate.com.
hostchocolate.com. 5 NS ns4.hostchocolate.com.
hostchocolate.com. 5 NS ns1.hostchocolate.com.
hostchocolate.com. 5 NS ns2.hostchocolate.com.
Authority
The response has no authority records.
Additional
ns1.hostchocolate.com. 5 A 185.136.96.99
ns2.hostchocolate.com. 5 A 185.136.97.99
ns3.hostchocolate.com. 5 A 185.136.98.99
ns4.hostchocolate.com. 5 A 185.136.99.99
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0