How to use Docker Swarm for orchestrating and managing a cluster of Docker containers?

To set up Docker Swarm for orchestrating containers, you should first initialize a Swarm cluster with one or more nodes. Then, do the steps below:

• Use `docker swarm init` on your primary node, then add other nodes as workers or managers using the join token.
• Define your services in Docker Compose files with the desired number of replicas, networks, and volumes.
• Deploy your stack with docker stack deploy, and Docker Swarm will handle the distribution and scaling of containers across the cluster.
• Make sure to utilize Swarm's built-in load balancing, and monitor the state of your Swarm with `docker service ls` and `docker service ps`.

Last but not least, ensure that your applications are stateless or use external storage for stateful services.