Setting webmail alias for roundcube - Nginx server

Hi all,

As per the above title - I've got CWP running and everything seems to be working fine. 

I can access roundcube by going to either:

https://server.example.com:2031/roundcube 

as well as:

https://111.222.1.235:2031/roundcube

I'm trying to setup nginx so that I can go to:

https://server.example.com/webmail

or even

https://webmail.example.com/

I know that nginx handles this type of thing differently to apache, so I'm wondering if anyone has got it working and if they could show me an example of their nginx domain.com.conf file ?

Any help appeciated :-)

Pete

A month and a half and no response?  Surely someone has got their nginx working this way.... ?

Pete