### 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 "https" if USE_SSL else "http"
def service_url(service_key, host=None, port=None):
    host = host or LOCALHOST
    port = port or service_port(service_key)
    return f"{get_protocol()}://{host}:{port}"
def external_service_url(service_key, host=None, port=None):
    host = host or HOSTNAME_EXTERNAL
    port = port or service_port(service_key, external=True)
    return service_url(service_key, host=host, port=port)
def get_edge_port_http():
    return EDGE_PORT_HTTP or EDGE_PORT
def get_edge_url(localstack_hostname=None, protocol=None):
    port = get_edge_port_http()
    protocol = protocol or get_protocol()
    localstack_hostname = localstack_hostname or LOCALSTACK_HOSTNAME
    return "%s://%s:%s" % (protocol, localstack_hostname, port)
if DEBUG:
    logging.getLogger("").setLevel(logging.DEBUG)
    logging.getLogger("localstack").setLevel(logging.DEBUG)
if LS_LOG in TRACE_LOG_LEVELS:
    load_end_time = time.time()
    LOG = logging.getLogger(__name__)
    LOG.debug(
        "Initializing the configuration took %s ms", int((load_end_time - load_start_time) * 1000)
    )
class ServiceProviderConfig(Mapping[str, str]):