How to set up a program on Heroku and a domain purchased from rucenter?

Question

Domain name market

There is an application on Heroku with the address movie-map.herokuapp.com
I bought a domain on NIC.RU moviemap.ru.
Domains are registered in Heroku: www.moviemap.ru, moviemap.ru
www.moviemap.ru works, but moviemap.ru doesn't.
At the moment, this is what is written:
@ NS ns3-l2.nic.ru.
@NS ns4-cloud.nic.ru.
@ NS ns4-l2.nic.ru.
@ NS ns8-cloud.nic.ru.
@ NS ns8-l2.nic.ru.
www CNAME movie-map.herokuapp.com.
When trying to do
@CNAME movie-map.herokuapp.com.
an error is displayed: It is
not allowed to use the @ symbol on the left side of the CNAME record RFC 1034, 1035
Please tell me how to make the addressmoviemap.ru worked too?

Answer 1

Enter:
@ A 174.129.25.170
This is from wwwizer.com/naked-domain-redirect Leave
this as well:
www CNAME movie-map.herokuapp.com