eth0 info [OT Feedback] The setup-host file appears to only use wifi wlan0 interface; added info about eth0

[jrhodie]

No description provided.

[gemini-code-assist]

Summary of Changes

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This pull request enhances the documentation for setting up an OpenThread Border Router (OTBR) Docker environment. It specifically addresses how the setup-host script identifies network interfaces, providing users with crucial information on its default behavior and a method to override interface selection for custom configurations.

Highlights

• Network Interface Documentation: Added clarification to the build-docker.md guide regarding how the setup-host script automatically detects network interfaces (wlan0 then eth0) and provided instructions on how to manually specify a different interface using the OT_INFRA_IF environment variable.

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Changelog

• site/en/guides/border-router/build-docker.md
  • Added details on setup-host script's automatic interface detection.
  • Included instructions for specifying a custom infrastructure interface using OT_INFRA_IF.

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[gemini-code-assist]

Code Review

This pull request adds helpful information to the Docker installation guide about how the setup-host script detects the network interface. It clarifies that it checks for wlan0 and eth0, and explains how to specify a different interface using the OT_INFRA_IF environment variable. I've found a minor typo in the new text and suggested a fix to improve readability.

[Vyrastas]

@jwhui is there someone on the Shanghai team that should verify this update?