If you really don't want to use different ports you can handle it with Docker. Since each container has its own IP, they can all expose the same port. Otherwise

If you really don't want to use different ports you can handle it with Docker. Since each container has its own IP, they can all expose the same port. Otherwise, for non-containerized deployments you'll have to resort to two different ports. In either case, you will need a reverse proxy like Traefik/Nginx in front to smartly "balance" incoming requests to the two instances of the service.