# Use a lightweight Python image
FROM python:3.11-slim

# Set working directory
WORKDIR /app

# Install system dependencies (optional but safe)
RUN apt-get update && apt-get install -y \
    build-essential \
    && rm -rf /var/lib/apt/lists/*

# Copy requirements first (better Docker caching)
COPY requirements.txt .

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

# Copy application code
COPY app.py .

# Expose the port Gunicorn will listen on
EXPOSE 3001

# Run Gunicorn
CMD ["gunicorn", "--bind", "0.0.0.0:3001", "app:app"]