fix(build): make Node 22 install deterministic in Dockerfile

- replace NodeSource setup_22.x pipe script with keyring + apt source
- prevent intermittent apt exit 100 during nodejs install
- bump add-on version to 0.5.57

Fixes #89

openclaw_assistant/Dockerfile

@@ -34,8 +34,14 @@ RUN apt-get update && apt-get install -y --no-install-recommends \
  && rm -rf /var/lib/apt/lists/*
 
 # Install Node.js 22 LTS from NodeSource (Debian Bookworm ships Node 18, but OpenClaw requires 20+)
-RUN curl -fsSL https://deb.nodesource.com/setup_22.x | bash - \
- && apt-get install -y nodejs \
+# Use explicit keyring + apt source instead of setup_22.x pipe script for deterministic builds.
+RUN mkdir -p /etc/apt/keyrings \
+ && curl -fsSL https://deb.nodesource.com/gpgkey/nodesource-repo.gpg.key \
+    | gpg --dearmor -o /etc/apt/keyrings/nodesource.gpg \
+ && echo "deb [signed-by=/etc/apt/keyrings/nodesource.gpg] https://deb.nodesource.com/node_22.x nodistro main" \
+    > /etc/apt/sources.list.d/nodesource.list \
+ && apt-get update \
+ && apt-get install -y --no-install-recommends nodejs \
  && apt-get clean \
  && rm -rf /var/lib/apt/lists/*