Chirpstack PostgreSQL Cluster

Hello,
we have to create a PostgreSQL cluster with three nodes multimaster for Chirpstack to improve write scalability and have HA resilience. We’re using your dockers, for all our ChirpStack nodes (Web Application, Network Server, ecc) and PostgreSQL too.
Is there a way to use your PostgreSQL docker on multi-master mode? is there a way to go over the “simple” two node master/slave (hot-standby) configuration?

Thank you
Regards