Dockerfile

# backend_files/Dockerfile

FROM python:3.9-slim

# 1. Set working directory
WORKDIR /app

# 2. Copy application code and model artifact
COPY . .

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

# 4. Bind Gunicorn to port 7860 (required by HF Spaces)
#    -w 4         : 4 worker processes
#    -b 0.0.0.0:7860 : listen on all interfaces at port 7860
#    app:app      : Flask app instance named `app` in app.py
CMD ["python", "backend_files/app.py"]