I have setup odoo (including an ecommerce site) on a linode server (Odoo v15), community edition).  Within the Odoo setup I have also setup a second website (for a different region).  Each website has their own domain name.  Thanks to some help I got here I have the two websites working quite well together,  the 2 sites share a few pages (including the sale items etc) and things are good.  

I am just having one last issue I have not been able to resolve.  And, I think this issue is having a negative effect on people finding my second site (for the other region).  The situation is that if i go to a browser and enter the full address for the second site (with the 'www') it works - the second site comes up.  However, if I go to a browser and enter the address of the second site (without the 'www'), the browser actually takes me to my first site.  In other words, if I try to go to the second site via a browser (just by putting in the address) it will take me to the first site unless I specify the 'www' in the address.

I am not sure whether the problem is within my odoo setup or within any of my domain settings etc on the linode side.  Any ideas on what I might be able to do to resolve this issue?  Many thanks in advance.