Q1: deploy and monitor app

Dockerfile

@@ -0,0 +1,20 @@
+FROM python:3.12-slim
+
+WORKDIR /app
+
+# Install dependencies first (layer caching)
+COPY requirements.txt .
+RUN pip install --no-cache-dir -r requirements.txt
+
+# Copy app code
+COPY app.py .
+
+EXPOSE 5000
+
+# Basic container-level health check (Docker/most platforms respect this)
+HEALTHCHECK --interval=30s --timeout=5s --start-period=10s --retries=3 \
+  CMD python -c "import urllib.request; urllib.request.urlopen('http://localhost:5000/health')" || exit 1
+
+# gunicorn for production-grade serving instead of Flask dev server
+CMD ["gunicorn", "--bind", "0.0.0.0:5000", "--workers", "2", "app:app"]
+