FROM python:3.11-slim

ENV PYTHONUNBUFFERED=1 \
    PIP_NO_CACHE_DIR=1 \
    PORT=7860

WORKDIR /app

# opencv-python-headless needs no system GL libs; keep the image lean.
COPY requirements.txt .
RUN pip install --upgrade pip && pip install -r requirements.txt

COPY . .

EXPOSE 7860
CMD ["python", "app.py"]