Sorry for the shameless plug.
I re-organized my docker4oe github repo quite a bit. It now incorporates a setup to build a Docker (compose) environment where Apache is used as a load balancer for 3 identical PAS instances, which also addresses fail over. For secure communication I included Letsencrypt certbot which makes it possible to get (and renew) a free certificate without too much hassle. For this, you do need a (sub)domain which you can point at a host you have full access to.
The repo is located at https://github.com/bfv/docker4oe
The specific of PAS load balanced are in: github.com/.../https-loadbalanced
I hope you appreciate my effort to share this. Have fun trying.
PS I tested everything on Windows 10 (1809). If there are issues on other OS's feel free to create a github issue. If they are Mac related I will not be able to fix them :-)