Add support for DevContainers

I am using DevContainers in my development setup with Docker Compose, but I am encountering difficulties in integrating it seamlessly with Spring Boot's Docker Compose support. Specifically, my devcontainer.json configuration looks like this:

{
  "dockerComposeFile": [
    "../compose.yaml",
    "./compose.override.yaml"
  ],
  "mounts": [
    "source=/var/run/docker.sock,target=/var/run/docker.sock,type=bind"
  ]
}

Due to this setup, I can't use Spring Boot's Docker Compose integration directly. Currently, I have to disable Docker Compose with:

spring.docker.compose.enabled=false

Then, I manually configure a DockerCompose bean:

@Bean
public DockerCompose dockerCompose() {
    return DockerCompose.get(
            DockerComposeFile.find(new File(".")),
            null,
            new HashSet<String>()
    );
}

While this allows me to get a list of all services, to obtain service connections, I need to copy and modify for instance RedisDockerComposeConnectionDetailsFactory, change some access modifiers, and tweak RunningService slightly.

Suggested Solution:

• Native DevContainers Support:
  Enhance Spring Boot's Docker Compose integration to natively support DevContainers configurations. This includes recognizing dockerComposeFile and mounts from devcontainer.json.

• Improved Service Connection Handling:
  Simplify the process to get service connections without needing to copy and modify existing connection details factories. Providing a more flexible API or built-in support for common DevContainers setups would be beneficial.

Benefits:

• Seamless Integration: Developers using DevContainers can leverage Spring Boot's Docker Compose support without extensive custom configurations.
• Improved Developer Experience: Reduces the need for workarounds, making it easier to manage services and connections in a DevContainer setup.
• Consistent Configuration: Aligns Spring Boot's Docker Compose functionality with modern development practices involving DevContainers.

Review Spring Boot's Docker Compose integration around DockerCompose, RedisDockerComposeConnectionDetailsFactory, and RunningService, then compare its assumptions with the reported devcontainer.json dockerComposeFile and mounts. Done means DevContainers can use the integration without disabling it or copying connection-details factories, with service connections remaining available through a supported API.