Running Zammad on docker using the same elasticsearch

Hi, I’m looking forward to setup zammad as dockerized instances, but using only one elasticsearch container. How can I achieve that? As we know, elasticsearch is quite resource-hungry, and with a limited resource available, I want to see how to achieve this?

What I expect:
2-3 Zammad Containers
1 Elasticsearch Container
All Zammad Containers are utilizing the same ES container.

Server Specs:
CentOS 7
4 vCPUs
8GB RAM

Really appreciate all the help and assistance!