# Use official Python image
FROM python:3.11-slim

# Set work directory
WORKDIR /app

# Install system dependencies
RUN apt-get update && apt-get install -y \
    build-essential \
    libpq-dev \
    && rm -rf /var/lib/apt/lists/*

# Copy requirements and install
COPY requirements.txt ./
RUN pip install --no-cache-dir -r requirements.txt

# Copy backend code
COPY . .

# Expose Flask port
EXPOSE 5000

# Set environment variables
ENV FLASK_APP=main.py
ENV FLASK_ENV=production

# Start the Flask app (use gunicorn for production)
CMD ["gunicorn", "main:app", "--bind", "0.0.0.0:5000", "--worker-class", "eventlet", "--workers", "1"]