FROM python:3.11-slim

WORKDIR /app

# Install deps first (better layer caching)
COPY requirements.txt .
RUN pip install --no-cache-dir -r requirements.txt

# Copy app code
COPY app.py .

# Hugging Face Spaces (and many platforms) expect 7860
EXPOSE 7860

# Run Streamlit
CMD ["streamlit", "run", "app.py", "--server.address=0.0.0.0", "--server.port=7860"]