FROM python:3.9-slim

# Set working directory
WORKDIR /app

# Copy backend files into container
COPY . .

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

# Start the SmartKart API using Gunicorn
# -w 4  → 4 worker processes
# -b 0.0.0.0:7860 → required port for Hugging Face Spaces
# app:smartkart_api → Flask instance name inside app.py
CMD ["gunicorn", "-w", "4", "-b", "0.0.0.0:7860", "app:app"]