Dockerfile

# Use Python 3.9 slim (runs as root by default)
FROM python:3.9-slim-bookworm

# --- Environment ---
ENV PYTHONDONTWRITEBYTECODE=1 \
    PYTHONUNBUFFERED=1 \
    STREAMLIT_HOME=/tmp/.streamlit \
    HOME=/tmp

# Create Streamlit config dir (root-owned, writable by root)
RUN mkdir -p $STREAMLIT_HOME

# --- System deps for conversions ---
RUN apt-get update && \
    DEBIAN_FRONTEND=noninteractive apt-get install -y --no-install-recommends \
      pandoc \
      unoconv \
      libreoffice-core \
      ffmpeg \
      libmagic1 && \
    rm -rf /var/lib/apt/lists/*

# --- Python deps ---
RUN pip install --no-cache-dir \
      streamlit==1.45.1 \
      pillow \
      pypandoc \
      ffmpeg-python \
      python-magic

# --- App code ---
COPY app.py /app/app.py
WORKDIR /app

# --- Expose & launch ---
EXPOSE 7860
CMD ["streamlit", "run", "app.py"]