Add entrypoint script to auto-activate venv in Docker

The entrypoint script ensures the virtual environment is properly activated
for all commands, not just interactive shells. This fixes the issue where
'docker run' commands wouldn't have VIRTUAL_ENV set.

The entrypoint:
1. Detects the architecture-specific venv path
2. Sources the venv's activate script
3. Executes the user's command with 'exec'

Author: llorracc

Dockerfile

@@ -42,12 +42,29 @@ RUN chmod +x /workspace/reproduce/docker/setup.sh && \
 
 # Set runtime environment
 # Note: The actual venv path depends on architecture (e.g., .venv-linux-x86_64 or .venv-linux-aarch64)
-# We add both possible paths to ensure the correct one is found
 ENV PATH="/workspace/.venv-linux-x86_64/bin:/workspace/.venv-linux-aarch64/bin:/home/vscode/.local/bin:$PATH"
 ENV PYTHONPATH="/workspace/code"
 
+# Create entrypoint script that activates the venv
+RUN echo '#!/bin/bash' > /home/vscode/entrypoint.sh && \
+    echo 'set -e' >> /home/vscode/entrypoint.sh && \
+    echo '' >> /home/vscode/entrypoint.sh && \
+    echo '# Determine architecture-specific venv path' >> /home/vscode/entrypoint.sh && \
+    echo 'ARCH=$(uname -m)' >> /home/vscode/entrypoint.sh && \
+    echo 'VENV_PATH="/workspace/.venv-linux-$ARCH"' >> /home/vscode/entrypoint.sh && \
+    echo '' >> /home/vscode/entrypoint.sh && \
+    echo '# Activate venv if it exists' >> /home/vscode/entrypoint.sh && \
+    echo 'if [ -f "$VENV_PATH/bin/activate" ]; then' >> /home/vscode/entrypoint.sh && \
+    echo '    source "$VENV_PATH/bin/activate"' >> /home/vscode/entrypoint.sh && \
+    echo 'fi' >> /home/vscode/entrypoint.sh && \
+    echo '' >> /home/vscode/entrypoint.sh && \
+    echo '# Execute the command' >> /home/vscode/entrypoint.sh && \
+    echo 'exec "$@"' >> /home/vscode/entrypoint.sh && \
+    chmod +x /home/vscode/entrypoint.sh
+
 # Expose common ports
 EXPOSE 8888 8866
 
-# Default command
+# Use entrypoint to activate venv, then run command
+ENTRYPOINT ["/home/vscode/entrypoint.sh"]
 CMD ["/bin/bash"]