### Is there an existing issue for this?

- [X] I have searched the existing issues

### Feature description

Currently, the default port range for external services is configured in `config.py` as follows:
https://github.com/localstack/localstack/blob/075a6fcfcc29af99e1997d73abea6e88351f3c84/localstack/config.py#L462-L472
This means that the default service range is: (4510,4540]
But the example `docker-compose.yml` states (4510, 4530):
https://github.com/localstack/localstack/blob/075a6fcfcc29af99e1997d73abea6e88351f3c84/docker-compose.yml#L12

The currently stated 20 ports can already be somewhat limiting if a lot of external services are started (f.e. lots of clusters or databases). Therefore the range should be broadened and correctly defined in our example `docker-compose.yml` file.

### 🧑‍💻 Implementation

- [x] Broaden the service port range to 50 ports.
- [x] Update the example docker-compose file.

### Anything else?

_No response_
return DOCKER_CLIENT.is_container_running(container_name)
    if not poll_condition(is_container_running, timeout=timeout):
        return False
    logfile = LocalstackContainer(container_name).logfile
    ready = threading.Event()
    def set_ready_if_marker_found(_line: str):
        if _line == constants.READY_MARKER_OUTPUT:
            ready.set()
    
    listener = FileListener(logfile, set_ready_if_marker_found)
    listener.start()
    try:
        
        with open(logfile, "r") as fd:
            for line in fd:
                if constants.READY_MARKER_OUTPUT == line.strip():
                    return True
        
        return ready.wait(timeout)
    finally:
        listener.close()
def in_ci():
    """Whether or not we are running in a CI environment"""
    for key in ("CI", "TRAVIS"):
        if os.environ.get(key, "") not in [False, "", "0", "false"]:
            return True
    return False