FROM python:3.9-slim

WORKDIR /app

RUN apt-get update && \
    apt-get install -y --no-install-recommends curl gcc python3-dev && \
    rm -rf /var/lib/apt/lists/* && \
    mkdir -p /data && \
    chmod 777 /data && \
    useradd -m appuser && \
    chown appuser:appuser /data

USER appuser

COPY requirements.txt .
RUN pip install --no-cache-dir -r requirements.txt

COPY app.py config.yaml ./

ENV MPLCONFIGDIR=/tmp/matplotlib

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