Replace the coturn image's fragile eval-based entrypoint with a robust wrapper that handles external IP detection without word-splitting issues. The image's `exec $(eval "echo $@")` produces empty tokens when DETECT_EXTERNAL_IP's DNS lookup fails → "ERROR: CONFIG: Unknown argument:" Also add --listening-ip=0.0.0.0 so coturn binds a single wildcard address instead of enumerating every host interface (reduces log noise). https://claude.ai/code/session_01KWVtEt9MmZdywcu7WmgchX