- Call apply_env_overrides() after Config::load_or_init() in main.rs so
environment variables (API_KEY, PROVIDER, ZEROCLAW_GATEWAY_PORT, etc.)
are actually applied at runtime, not just in tests
- Add ZEROCLAW_ALLOW_PUBLIC_BIND env var support for gateway bind policy
- Fix docker-compose.yml: correct volume path (/zeroclaw-data not /data),
add ZEROCLAW_ALLOW_PUBLIC_BIND=true for container networking, make host
port configurable via HOST_PORT env var
- Add docker-compose.override.yml to .gitignore for local dev overrides
