usually i point the www to the ip address of the server and then create a redirect block on nginx, but this seems like extra work for nothing. 

Tested the cname point to the address but this seems to not work.

going to try a url redirect record, but not sure if this is correct either

I tested this domain name setting change, but it seems that a nginx block is still better to do this. Add this above your current block to catch the www and redirect it. 

NGINX

server {
    listen 80;
    server_name www.example.com;
    return 301 $scheme://example.com$request_uri;
}

Ok so this still was not working, you have to add the return in the main server block where the cert is added, as i had a seperate config for the www version of the site. 

It was ignoring the 80 as thats non ssl, but if it is set to https it checks the main block and ignores the 80 or http. 

Adding this line fixed it for me, in the www block. 

NGINX

server {
    root /var/www/html/kruxor.com;
    server_name www.kruxor.com;
    return 301 $scheme://kruxor.com$request_uri;
}