Testcontainers – Run container with different database in integration test

During the maven package phase I build an docker image of my application:

<plugin>
    <groupId>com.spotify</groupId>
    <artifactId>dockerfile-maven-plugin</artifactId>
    <version>${version.dockerfile-plugin}</version>
    <executions>
        <execution>
            <id>default</id>
            <goals>
                <goal>build</goal>
            </goals>
        </execution>
    </executions>
    <configuration>
        <repository>archetype/thorntail</repository>
        <tag>${project.version}</tag>
        <buildArgs>
            <JAR_FILE>${project.build.finalName}-thorntail.jar</JAR_FILE>
        </buildArgs>
    </configuration>
</plugin>

In my integration test I use this image of my app as follows:

@Container
private static GenericContainer apiContainer =
        new GenericContainer("archetype/thorntail:0")
                .withExposedPorts(THORNTAIL_WEB_PORT)
                .waitingFor(
                        Wait.forHttp("/base/api/hello")
                );

My question: How can I signal my container that it is running in an integration test and should therefore use a different database e.g. H2?

Source: StackOverflow