FROM python:3.11-slim

# Create a non-root user for security
RUN groupadd -r appuser && useradd -r -g appuser appuser

WORKDIR /app

# Install system dependencies for OCR and PDF processing
RUN apt-get update && apt-get install -y \
    build-essential \
    curl \
    git \
    tesseract-ocr \
    poppler-utils \
    && rm -rf /var/lib/apt/lists/*

COPY requirements.txt ./
RUN pip3 install --no-cache-dir -r requirements.txt

# Copy application files
COPY . .

# Set ownership to non-root user
RUN chown -R appuser:appuser /app

USER appuser

EXPOSE 8501

HEALTHCHECK CMD curl --fail http://localhost:8501/_stcore/health

ENTRYPOINT ["streamlit", "run", "app.py", "--server.port=8501", "--server.address=0.0.0.0"]