FROM python:3.10-slim

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

WORKDIR /app

# System deps
RUN apt-get update && apt-get install -y --no-install-recommends \
    build-essential \
 && rm -rf /var/lib/apt/lists/*

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

# App code
COPY streamlit_app /app/streamlit_app

EXPOSE 7860

# Start Streamlit on HF-provided $PORT
CMD ["bash", "-lc", "streamlit run streamlit_app/app_streamlit.py --server.port=${PORT} --server.address=0.0.0.0"]