FROM python:3.12-slim

# Set environment variables
ENV PYTHONDONTWRITEBYTECODE=1 \
    PYTHONUNBUFFERED=1 \
    PORT=5000

# Set working directory
WORKDIR /app

# Install system dependencies (if any needed)
# RUN apt-get update && apt-get install -y --no-install-recommends \
#     && rm -rf /var/lib/apt/lists/*

# Copy requirements first for better layer caching
COPY requirements.txt .

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

# Copy application code
COPY app.py .
COPY templates/ templates/

# Create a non-root user to run the app
RUN useradd -m appuser
USER appuser

# Expose the port
EXPOSE 5000

# Run the app with gunicorn
CMD ["sh", "-c", "gunicorn --bind 0.0.0.0:${PORT} --workers 2 --threads 4 app:app"]