Release v1.5.0: Restructure chapters and update for Docker v30.x

09_compose/demo/app/Dockerfile

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+FROM python:3.12-alpine
+ADD . /code
+WORKDIR /code
+RUN pip install redis flask
+CMD ["python", "app.py"]

09_compose/demo/app/app.py

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+from flask import Flask
+from redis import Redis
+
+app = Flask(__name__)
+redis = Redis(host='redis', port=6379)
+
+@app.route('/')
+def hello():
+    count = redis.incr('hits')
+    return 'Hello World! 该页面已被访问 {} 次。\n'.format(count)
+
+if __name__ == "__main__":
+    app.run(host="0.0.0.0", debug=True)

09_compose/demo/app/docker-compose.yml

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+
+services:
+
+  web:
+    build: .
+    ports:
+     - "5000:5000"
+
+  redis:
+    image: "redis:alpine"