High availability/Load balancing?

Hello!

I’m using SWAG container and it works awesome.
Just want to know is there a way to configure HA/LB using the SWAG / Nginx?
I need a simple configuration for a web site (no database or anything) - so it will be two docker containers in two different RPi s.

https://site.domain.com => can go to either RPi1:port or RPi2:port

Thank you!