Simple set up docker network as bridge to docker containers in docker-compose.

docker-compose.yml

version: 'Here your version'
services:
  webserver:
    networks:
      name_network_here:
        ipv4_address: '172.25.1.10'
        
  
  ciserver:
    networks:
      name_network_here:
        ipv4_address: '172.25.1.11'

networks:
  name_network_here:
    driver: bridge
    ipam:
      config:
        - subnet: 172.25.1.0/24