Debian webpage design

Hi Debian team,

I would like to know which email address/list should I contact to ask 
about to collaborate with the main website design.

I found this email address: [email protected] but I'm not sure 
if it is the right one, and in the gitlab source code repo 
https://salsa.debian.org/webmaster-team/webwml I didn't see anything 
related with the mockups or designs (in case someone already presented 
some new layouts).

Thanks in advanced and have a nice day,

Joaquim