# Use an official lightweight Python image
FROM python:3.11-slim

# Set environment variables
ENV PYTHONDONTWRITEBYTECODE=1
ENV PYTHONUNBUFFERED=1

# Create a working directory
WORKDIR /app

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

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

# Copy the application code
COPY . .

# Expose port
EXPOSE 3248

# Run with Gunicorn WSGI server
# Assumes your Flask app is named "app" inside "app.py"
CMD ["gunicorn", "-w", "4", "-b", "0.0.0.0:3248", "app:app"]