Initial commit

Dockerfile

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+FROM python:3.8-slim
+COPY . /app
+WORKDIR /app
+RUN pip install -r requirements.txt
+ENTRYPOINT ["flask"]
+CMD ["run", "--host=0.0.0.0"]

app.py

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+from flask import Flask, render_template
+import pymysql
+
+app = Flask(__name__)
+
+db = pymysql.connect(
+  host="db",
+  user="user",
+  password="password",
+  database="mysqldb"
+)
+
+@app.route("/")
+def index():
+  cursor = db.cursor()
+  cursor.execute("SELECT * FROM users")
+  data = cursor.fetchall()
+  return render_template("index.html", data=data)
+
+if __name__ == "__main__":
+  app.run(host="0.0.0.0", port=5000)

docker-compose.yml

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+version: "3"
+services:
+  web:
+    build: .
+    ports:
+      - "5000:5000"
+    depends_on:
+      - db
+    environment:
+      - FLASK_APP=app.py
+      - FLASK_ENV=development
+  db:
+    image: mysql/mysql-server
+    ports:
+      - "3306:3306"
+    environment:
+      - MYSQL_DATABASE=mysqldb
+      - MYSQL_USER=user
+      - MYSQL_PASSWORD=password
+      - MYSQL_ROOT_PASSWORD=password
+    volumes:
+      - ./test.sql:/docker-entrypoint-initdb.d/test.sql

index.html

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+<html>
+<head>
+  <title>Flask App with MySQL</title>
+</head>
+<body>
+  <h1>Users</h1>
+  <table>
+    <tr>
+      <th>ID</th>
+      <th>Name</th>
+      <th>Email</th>
+    </tr>
+    {% for row in data %}
+    <tr>
+      <td>{{ row[0] }}</td>
+      <td>{{ row[1] }}</td>
+      <td>{{ row[2] }}</td>
+    </tr>
+    {% endfor %}
+  </table>
+</body>
+</html>

requirements.txt

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+Flask==2.0.2
+pymysql==1.0.2

test.sql

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+CREATE TABLE users (
+  id INT PRIMARY KEY,
+  name VARCHAR(255),
+  email VARCHAR(255)
+);
+
+INSERT INTO users VALUES (1, 'Alice', 'alice@example.com');
+INSERT INTO users VALUES (2, 'Bob', 'bob@example.com');
+INSERT INTO users VALUES (3, 'Charlie', 'charlie@example.com');