[MM3-users] Change Base URI for Mailman 3.1

I'm tinkering with docker container of mailman 3.1 however I'm trying to utilize existing nginx server thus I need to map "/mailman" to mailman-web docker container vs default "/" mapping. Where do I configure base URI for mailman-web ?

(quick search of archives and googling didn't yield any positive results thus far)

-- Sr System and DevOps Engineer SoM IRT