### Is there an existing issue for this?

- [X] I have searched the existing issues

### Current Behavior

- following the [installation steps](https://docs.localstack.cloud/getting-started/installation/) fails when validating localstack configuration

- error
![image](https://github.com/localstack/localstack/assets/10324554/d82ef62e-c8b8-402e-8195-e691733cfeb1)

- localstack is indeed running
![image](https://github.com/localstack/localstack/assets/10324554/44d7180a-5090-416d-afa9-c4eaaedca33e)


### Expected Behavior

- localstack can consume the path I pass `--file`

### How are you starting LocalStack?

With a docker-compose file

### Steps To Reproduce

#### How are you starting localstack (e.g., `bin/localstack` command, arguments, or `docker-compose.yml`)

    docker compose up -d
    localstack config validate --file ./compose.yaml


### Environment

```markdown
OS: Ubuntu 20.04
    LocalStack: latest
```


### Anything else?

- you can reproduce [on this branch](https://github.com/noahehall/localstack/tree/rds) if it still exists
  - else switch to the develop branch
container: LocalstackContainer
    def __init__(self, container=None) -> None:
        super().__init__(config.EDGE_PORT, config.EDGE_BIND_HOST)
        self.container = container or LocalstackContainer()
    def is_up(self) -> bool:
        """
        Checks whether the container is running, and the Ready marker has been printed to the logs.
        """
        if not self.is_container_running():
            return False
        logs = DOCKER_CLIENT.get_container_logs(self.container.name)
        if constants.READY_MARKER_OUTPUT not in logs.splitlines():
            return False
        
        return super().is_up()
    def is_container_running(self) -> bool: