FROM python:3.12-slim

ENV PYTHONUNBUFFERED=1
WORKDIR /app

# Deps first so a code-only change doesn't bust the pip-install cache.
COPY requirements.txt .
RUN pip install --no-cache-dir -r requirements.txt

# App code.
COPY . .

EXPOSE 8000

HEALTHCHECK --interval=30s --timeout=5s --start-period=10s --retries=3 \
  CMD python -c "import urllib.request,sys; sys.exit(0 if urllib.request.urlopen('http://127.0.0.1:8000/health', timeout=3).status==200 else 1)"

CMD ["uvicorn", "app:app", "--host", "0.0.0.0", "--port", "8000", "--proxy-headers", "--forwarded-allow-ips", "*"]