# Build stage
FROM python:3.9-slim as build
WORKDIR /app
COPY requirements.txt .
RUN pip install --no-cache-dir -r requirements.txt

# Runtime stage
FROM python:3.9-slim
WORKDIR /app
COPY --from=build /usr/local/lib/python3.9/site-packages /usr/local/lib/python3.9/site-packages
COPY . .
RUN pip install --no-cache-dir gunicorn
EXPOSE 5000
CMD ["gunicorn", "--bind", "0.0.0.0:5000", "app:app"]