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# Sandbox Dockerfile — Python execution
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FROM python:3.12-alpine
# Create sandbox user
RUN adduser -D -u 1000 sandbox
# Install common Python packages
RUN pip install --no-cache-dir numpy pandas
# Create workspace
RUN mkdir -p /sandbox && chown sandbox:sandbox /sandbox
# Remove pip to prevent installs
RUN rm -rf /usr/local/bin/pip /usr/local/bin/pip3
USER sandbox
WORKDIR /sandbox
ENTRYPOINT ["sh", "-c"]
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