FROM python:3.13.2-slim-bullseye

# Install minimal system dependencies and build tools for Python packages
RUN apt-get update && apt-get install -y --no-install-recommends \
    build-essential \
    gcc \
    g++ \
    && rm -rf /var/lib/apt/lists/*

# Set working directory
WORKDIR /app

# Copy only requirements first to leverage Docker cache
COPY requirements.txt .

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

# Remove build tools to reduce image size
RUN apt-get purge -y --auto-remove \
    build-essential \
    gcc \
    g++

# Copy rest of the app code
COPY . .

# Create a non-root user for security reasons
RUN useradd -m appuser
USER appuser

# Run the Python application
CMD ["python", "sqs_processor.py"]