FROM python:3.11-slim

# Install sipcalc and dependencies
RUN apt-get update && \
    apt-get install -y --no-install-recommends sipcalc && \
    rm -rf /var/lib/apt/lists/*

# Set up app directory
WORKDIR /app

# Install Flask
RUN pip install --no-cache-dir flask

# Copy app code
COPY app.py .

EXPOSE 5000

CMD ["python", "app.py"]