I have web application which has pre prod and prod environments.

Due to cost I want to setup both pre prod and prod in same vps.

I have pre prod docker setup as belep

Container.   Port
 pre-prod-db   5432 
  app.         8081
   UI.         9081
  Proxy.       80 443

But as per docker I can’t have same port assigned to another container in prod setup. is there a way to have both pord and pre-prod setup done on same vps. In nginx reverse proxy; port need to be 80 & 443 which results in port conflict.