Pin all base images and ollama to fixed versions + @sha256 digests (no floating :latest), run Docker images as an unprivileged openjarvis user (uid 10001), replace the curl|bash NodeSource install with a digest-pinned multi-stage copy, install from the committed uv.lock via uv export --frozen --no-dev (hash-verified, --no-deps), and add systemd sandboxing (NoNewPrivileges, ProtectSystem=strict, PrivateTmp, kernel/SUID protections). Closes#228, #563, #564, #565, #566, #567.
