Docker cluster install help

We are working on a Nextcloud solution for my office but more importantly, we are needing to use a cluster environment. I have setup and built the cluster using 2 webservers and 2 database servers, a redis server, and a load balancer, in doing so, all went well but now I am having to attempt this cluster build using a docker setup. I am having trouble using 2 web front ends on 2 independent servers (used for failover and high traffic) all with the docker setup. Is this even possible with the docker setup of Nextcloud? I have read a few times from post in 2015 that it was not an option but that was so long ago, I would imaginge Nextcloud has come a long way over the last few years.