FROM python:3.9-buster

ENV PYTHONDONTWRITEBYTECODE=1
ENV PYTHONUNBUFFERED=1

# Install system packages: poppler-utils (for pdf2image) and necessary libs for WeasyPrint.
RUN apt-get update && apt-get install -y \
    poppler-utils \
    libpango-1.0-0 \
    libpangocairo-1.0-0 \
    libgdk-pixbuf2.0-0 \
    libffi-dev \
    libcairo2 \
    && rm -rf /var/lib/apt/lists/*

WORKDIR /app

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

COPY . /app

EXPOSE 7860

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