Jvb Docker Compose Scale

Hi,I use jitsi docker deployment.I am trying to scale jvb using docker compose.
I changed jvb service like this.

jvb:
image: jitsi/jvb:{IMAGE_TAG} container_name: jvb restart: {RESTART_POLICY}
depends_on:
- prosody
networks:
meet.jitsi:
environment:
- XMPP_AUTH_DOMAIN
- TZ
- DOCKER_HOST_ADDRESS
- XMPP_INTERNAL_MUC_DOMAIN
- XMPP_SERVER
- JVB_AUTH_USER
- JVB_AUTH_PASSWORD
- JVB_BREWERY_MUC
- JVB_PORT
- JVB_TCP_HARVESTER_DISABLED
- JVB_TCP_PORT
- JVB_STUN_SERVERS
- JVB_ENABLE_APIS
volumes:
- {CONFIG}/jvb:/config:Z ports: - '10000-10001:{JVB_PORT}/udp’
- ‘4443-4444:${JVB_TCP_PORT}’

when i run this command i get 2 instances from jvb.but then i don’t know what to do to run jvb 2 instance.
docker-compose up -d --scale jvb=2

If anyone knows any work around then please do share.

Thanks