FROM python:3.11-slim

WORKDIR /app

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

COPY . .

# Uploads persist here; mount a volume to keep them across container rebuilds.
ENV UPLOADER_ROOT=/data/uploads
RUN mkdir -p /data/uploads /app/instance

EXPOSE 5000

CMD ["gunicorn", "-w", "2", "-k", "gthread", "--threads", "8", \
     "-b", "0.0.0.0:5000", "wsgi:application"]
