reactjs – React router, Nginx reverse proxy

I’m trying to use nginx proxy manager to reverse proxy my two development react project like this
Proxy initial setting, custom location to login. but when im accessing the /login error pageinstead show login page, it shows not found exception that throw by react router feture a, instead login page from feature login. any idea how to set a config or did i miss something

in development nginx proxy manager able to revere proxy, when the url / it show main page of feature a, and when the url /login it shows a login page from feature-login