FROM python:3.9-slim

# Set working directory
WORKDIR /app

# Install system dependencies
RUN apt-get update && apt-get install -y \
    build-essential \
    curl \
    software-properties-common \
    git \
    && rm -rf /var/lib/apt/lists/*

# Copy requirements and app source code
COPY requirements.txt ./
COPY src/ ./src/

# Install Python dependencies
RUN pip3 install --no-cache-dir -r requirements.txt

# Expose Streamlit default port
EXPOSE 8501

# Healthcheck with proper interval and retries
HEALTHCHECK --interval=30s --timeout=10s --retries=3 \
  CMD curl --fail http://localhost:8501/_stcore/health || exit 1

# Start Streamlit app
ENTRYPOINT ["streamlit", "run", "src/app.py", "--server.port=8501", "--server.address=0.0.0.0"]