FROM python:3.11-slim

WORKDIR /app

# Make Python output unbuffered so logs show up immediately.
ENV PYTHONUNBUFFERED=1

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

COPY app.py /app/app.py

EXPOSE 7860

# Exec-form CMD (PID 1 = uvicorn process)
CMD ["python", "-u", "/app/app.py"]