Dockerfile

# 1. Base image
FROM python:3.9-slim

# 2. Prevent __pycache__, buffer logs
ENV PYTHONDONTWRITEBYTECODE=1
ENV PYTHONUNBUFFERED=1

# 3. Define where uploads go
ENV UPLOAD_DIR=/mnt/data

# 4. Set working dir
WORKDIR /app

# 5. System deps (only if you need to compile wheels)
RUN apt-get update \
 && apt-get install -y --no-install-recommends build-essential \
 && rm -rf /var/lib/apt/lists/*

# 6. Python deps
COPY requirements.txt .
RUN pip install --no-cache-dir -r requirements.txt

# 7. Copy app code
COPY . .

# 8. Pre-create writable dirs
RUN mkdir -p "${UPLOAD_DIR}/uploads" static/images \
 && chmod -R 777 "${UPLOAD_DIR}/uploads" static/images

# 9. Expose & run
EXPOSE 7860
CMD ["gunicorn", "--workers", "4", "--bind", "0.0.0.0:7860", "app:app"]