Dockerfile

# Dockerfile for Streamlit frontend (HF Spaces) — robust PORT handling
FROM python:3.10-slim

ENV PYTHONDONTWRITEBYTECODE=1
ENV PYTHONUNBUFFERED=1

WORKDIR /app

# Install system deps needed by some Python packages (Pillow, etc.)
RUN apt-get update && apt-get install -y --no-install-recommends \
    build-essential \
    libglib2.0-0 \
    libsm6 \
    libxext6 \
    libxrender1 \
    libjpeg-dev \
    zlib1g-dev \
 && rm -rf /var/lib/apt/lists/*

# Copy and install Python requirements
COPY requirements.txt .
RUN pip install --no-cache-dir --upgrade pip
RUN pip install --no-cache-dir -r requirements.txt

# Copy app code
COPY . .

# Expose a port (clarity only)
EXPOSE 7860

# Robust start: prefer $PORT, fall back to STREAMLIT_SERVER_PORT, then 7860
# This prevents an empty $PORT producing invalid CLI args.
CMD ["sh", "-c", "PORT=${PORT:-${STREAMLIT_SERVER_PORT:-7860}}; echo \"Starting Streamlit on port $PORT\"; streamlit run app.py --server.port $PORT --server.address 0.0.0.0 --server.headless true"]