The host-gateway configuration is specific to Docker Desktop (but doesn't break Podman)

Formerly https://github.com/restatedev/documentation/issues/599#issuecomment-2816323276

Where: search for host-gateway

https://github.com/search?q=repo%3Arestatedev%2Fdocs-restate%20host-gateway&type=code

For example:

https://docs.restate.dev/server/deploy/docker

Notes for documentation:

• The host-gateway value is a Docker Desktop thing
• Moby, Rancher Desktop w/Moby and Podman already have host.docker.internal mapped; there is no need for host-gateway
• Podman is not broken by the unnecessary --add-host=host.docker.internal:host-gateway
• Rancher Desktop is broken by --add-host=host.docker.internal:host-gateway because host-gateway is undefined

Aside: On current versions of Rancher Desktop port 9080 may already be used for its dashboard, but this will change when this fix is released.

Search the documentation repository for host-gateway, starting with the Docker deployment page at docs.restate.dev/server/deploy/docker. Review each occurrence against the Docker Desktop, Moby, Rancher Desktop, and Podman notes in the issue. Done means the instructions no longer break Rancher Desktop and accurately explain where the setting is needed.