如何使用docker使用peewee和mysql？

version: '3'
services:
  db:
    image: mysql:latest
    environment:
      MYSQL_ROOT_PASSWORD: your_password
      MYSQL_DATABASE: your_database
      MYSQL_USER: your_user
      MYSQL_PASSWORD: your_password
    volumes:
      - ./data:/var/lib/mysql
  app:
    build: .
    depends_on:
      - db
    links:
      - db
    environment:
      - DATABASE_HOST=db
      - DATABASE_PORT=3306
      - DATABASE_NAME=your_database
      - DATABASE_USER=your_user
      - DATABASE_PASSWORD=your_password

FROM python:3.9

WORKDIR /app

COPY requirements.txt .

RUN pip install --no-cache-dir -r requirements.txt

COPY . .

CMD ["python", "app.py"]

peewee==3.14.4
mysql-connector-python==8.0.26

from peewee import *

db = MySQLDatabase(
    'your_database',
    user='your_user',
    password='your_password',
    host='db',
    port=3306
)

class BaseModel(Model):
    class Meta:
        database = db

class User(BaseModel):
    username = CharField()
    email = CharField()

db.connect()
db.create_tables([User])

user = User(username='john', email='john@example.com')
user.save()

users = User.select()
for user in users:
    print(user.username, user.email)

docker-compose up