Swarm on Pi ClusterHat - homebridge - need help

Hello there!
I need your help: I set up a ClusterHat on an Pi3 with two Pi Zeros and configured it as a swarm, following this guide: http://niels.nu/blog/2017/docker-swarm-bramble-raspberry-clusterhat.html

Then I wanted to install homebridge, following this guide: https://github.com/oznu/docker-homebridge/wiki/Homebridge-on-Raspberry-Pi#2-install-docker-compose

And then I ran into problems: docker told me, that the docker-compose.yml isn’t ready for swarm.

I found out, that docker-compose in version 3 can handle a swarm, but the guide uses version 2.

What can I do now? Rewriting docker-compose.yml? Docker said something about “docker stack deploy”, but I don’t know what to do:

docker-compose up -d
WARNING: The Docker Engine you’re using is running in swarm mode.
Compose does not use swarm mode to deploy services to multiple nodes in a swarm. All containers will be scheduled on the current node.
To deploy your application across the swarm, use docker stack deploy.

Greets! Nils

docker-compose.yml:

version: '2’
services:
homebridge:
image: oznu/homebridge:raspberry-pi
restart: always
network_mode: host
volumes:
- ./config:/homebridge
environment:
- PGID=1000
- PUID=1000