[documentation] Missing documentation for sandbox feature

[docker-agent]

🟡 medium - documentation

File: docs/community/contributing/index.md (line 1)

Code

--sandbox flag in cmd/root/run.go

Problem

The sandbox feature (--sandbox flag) is implemented in the codebase but not documented in the contributing guide or README. Users won't know this feature exists or how to use it. The feature requires Docker Desktop with sandbox support, which is a prerequisite that should be documented.

Suggested Fix

Add a section to the contributing guide or README documenting the sandbox feature, including:

1. What it does
2. Prerequisites (Docker Desktop with sandbox support)
3. How to use it (--sandbox flag)
4. Example usage
5. Any limitations or troubleshooting tips

---

Found by nightly codebase scan