Add Docker support for running the app

Dockerfile

@@ -0,0 +1,24 @@
+# Use an official Python runtime as the base image
+FROM python:3.9-slim
+
+# Set the working directory in the container
+WORKDIR /app
+
+# Copy the requirements file into the container
+COPY requirements.txt .
+
+# Install the required packages
+RUN pip install --no-cache-dir -r requirements.txt
+
+# Copy the rest of the application code into the container
+COPY . .
+
+# Set environment variables
+ENV FLASK_APP=app.py
+ENV FLASK_RUN_HOST=0.0.0.0
+
+# Expose the port on which the app will run
+EXPOSE 5000
+
+# Run the Flask application
+CMD ["flask", "run", "--host=0.0.0.0"]

README.md

@@ -25,6 +25,11 @@ flask run
 
 Go to http://127.0.0.1:5000/
 
+or you can use `docker` to run this project:
+```
+docker-compose up
+```
+
 ## More details
 关于这个项目的详细介绍：[Flask实践：计算器](https://zhuanlan.zhihu.com/p/24120882)  
 更多关于Flask的原创优质内容，欢迎关注[Hello, Flask!——知乎专栏](https://zhuanlan.zhihu.com/flask)

docker-compose.yml

@@ -0,0 +1,12 @@
+services:
+  calculator:
+    build: .
+    container_name: calculator
+    ports:
+      - "5000:5000"
+    networks:
+      - calculator-network
+
+networks:
+  calculator-network:
+    driver: bridge

requirements.txt

@@ -4,3 +4,5 @@ Werkzeug==0.13
 # deploy
 gunicorn==19.5.0
 gevent
+markupsafe==2.0.1
+itsdangerous==2.0.1