Compose: Add guidance for using host network in Swarm mode and Docker Stack

[deahtstroke]

Description

This PR adds a new how-to section explaining how to use the host network when deploying services in Swarm mode via docker stack deploy.

Key additions:

• YAML example showing how to reference the built-in host network as an external network.
• A note outlining key limitations when using host networking with Swarm, such as:
  • Only supported in global service mode
  • No support for Swarm ingress networking or service discovery
  • Port-binding limitations

This is meant to clarify a niche but important case for users deploying Compose files to Swarm clusters that need access to the host's network. Let me know if there are other cross-references I should do in other parts of the docs.

Related issues or tickets

Issue 22684

Reviews

• Technical review
• Editorial review
• Product review

[netlify]

✅ Deploy Preview for docsdocker ready!

Name	Link
🔨 Latest commit	0d85e2a
🔍 Latest deploy log	https://app.netlify.com/projects/docsdocker/deploys/68392c034f64eb0008846aab
😎 Deploy Preview	https://deploy-preview-22724--docsdocker.netlify.app
📱 Preview on mobile	Toggle QR Code... Use your smartphone camera to open QR code link.

---

To edit notification comments on pull requests, go to your Netlify project configuration.

[aevesdocker]

Thanks for the PR @deahtstroke. Will take a look shortly

[deahtstroke]

Hi, any update on the review of this PR?