Dockerfile with health

Dockerfile

+FROM python:3.11-slim
+
+ENV PYTHONDONTWRITEBYTECODE=1
+ENV PYTHONUNBUFFERED=1
+
+WORKDIR /app
+
+# Install build deps needed for some packages (cryptography, etc.) then remove them
+RUN apt-get update && \
+    apt-get install -y --no-install-recommends build-essential libssl-dev libffi-dev curl ca-certificates && \
+    rm -rf /var/lib/apt/lists/*
+
+COPY requirements.txt ./
+
+RUN pip install --upgrade pip && \
+    pip install --no-cache-dir -r requirements.txt
+
+# Copy application
+COPY . /app
+
+ENV FLASK_APP=app:create_app
+EXPOSE 5000
+
+# Healthcheck: call the Flask /health endpoint
+HEALTHCHECK --interval=30s --timeout=5s --start-period=5s --retries=3 \
+    CMD curl -fS http://127.0.0.1:5000/health || exit 1
+
+# Use gunicorn and call the factory to create the app
+CMD ["gunicorn", "-b", "0.0.0.0:5000", "app:create_app()"]

app.py

@@ -22,6 +22,10 @@ def create_app():
     def bad_request(e):
         return jsonify({'error': 'Bad request', 'message': str(e)}), 400
 
+    @app.route('/health', methods=['GET'])
+    def health():
+        return jsonify({'status': 'ok'})
+
     @app.route('/cars', methods=['GET'])
     def list_cars():
         cars = Car.query.all()

requirements.txt

@@ -4,4 +4,5 @@ PyMySQL>=1.0
 cryptography==46.0.3
 Flask-Migrate>=4.0
 pytest>=7.0
-pytest-flask>=1.2
+pytest-flask>=1.2
\ No newline at end of file
+gunicorn>=20.0
\ No newline at end of file