Como executar o MySQL no Docker sempre que o Spring Boot iniciar | Kotlin e Spring: testes automatizados e documentação de API

Uma forma que encontrei para executar o MySQL no Docker sempre que o Spring Boot inicializar, sem a necessidade de ter que abrir o terminal e passar comandos Docker, é por meio da criação de um arquivo docker-compose.dev.yml e da adição de algumas dependências no pom.xml e configurações no application-dev.yml.

docker-compose.dev.yml:

services:
  mysql:
    image: 'mysql:9.1.0'
    environment:
      - 'MYSQL_DATABASE=forum'
      - 'MYSQL_PASSWORD=secret'
      - 'MYSQL_ROOT_PASSWORD=verysecret'
      - 'MYSQL_USER=myuser'
    ports:
      - '3306:3306'

pom.xml:

...
<dependencies>
    ...
    <dependency>
        <!-- https://mvnrepository.com/artifact/org.springframework.boot/spring-boot-docker-compose -->
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-docker-compose</artifactId>
            <scope>runtime</scope>
            <optional>true</optional>
            <version>3.3.2</version>
        </dependency>
    
        <!-- https://mvnrepository.com/artifact/com.mysql/mysql-connector-j -->
        <dependency>
            <groupId>com.mysql</groupId>
            <artifactId>mysql-connector-j</artifactId>
            <scope>runtime</scope>
            <version>9.1.0</version>
        </dependency>
    
        <!-- https://mvnrepository.com/artifact/org.springframework.boot/spring-boot-testcontainers -->
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-testcontainers</artifactId>
            <scope>test</scope>
            <version>3.3.2</version>
        </dependency>
    
        <!-- https://mvnrepository.com/artifact/org.testcontainers/junit-jupiter -->
        <dependency>
            <groupId>org.testcontainers</groupId>
            <artifactId>junit-jupiter</artifactId>
            <scope>test</scope>
            <version>1.19.8</version>
        </dependency>
    
        <!-- https://mvnrepository.com/artifact/org.testcontainers/mysql -->
        <dependency>
            <groupId>org.testcontainers</groupId>
            <artifactId>mysql</artifactId>
            <scope>test</scope>
            <version>1.19.8</version>
        </dependency>
</dependencies>
...

application-dev.yml:

spring:
  docker:
    compose:
      file: docker-compose.dev.yml
...

Dessa forma, toda vez que o Spring for inicializado, ele irá subir um container Docker com o MySQL.

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