Apex domains cannot have CNAME records.
Question and response
Question
dig hishersrestaurantphilly.com. NS
Answer
hishersrestaurantphilly.com. 5 NS ns1.hishersrestaurantphilly.com.
hishersrestaurantphilly.com. 5 NS ns2.hishersrestaurantphilly.com.
Authority
The response has no authority records.
Additional
ns1.hishersrestaurantphilly.com. 5 A 31.14.41.27
ns2.hishersrestaurantphilly.com. 5 A 185.105.4.220
. 0 OPT ; payload 1232, xrcode 0, version 0, flags 0