### 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_
CACHE_DIR = os.environ.get("CACHE_DIR", os.path.join(TMP_FOLDER, "cache")).strip()
VAR_LIBS_DIR = os.environ.get("VAR_LIBS_DIR", os.path.join(TMP_FOLDER, "var_libs")).strip()
LS_LOG = eval_log_type("LS_LOG")
DEBUG = is_env_true("DEBUG") or LS_LOG in TRACE_LOG_LEVELS
DEVELOP = is_env_true("DEVELOP")
DEVELOP_PORT = int(os.environ.get("DEVELOP_PORT", "").strip() or DEFAULT_DEVELOP_PORT)
WAIT_FOR_DEBUGGER = is_env_true("WAIT_FOR_DEBUGGER")
USE_SSL = is_env_true("USE_SSL")
USE_SINGLE_REGION = is_env_true("USE_SINGLE_REGION")
TF_COMPAT_MODE = is_env_true("TF_COMPAT_MODE")
DEFAULT_ENCODING = "utf-8"
DOCKER_SOCK = os.environ.get("DOCKER_SOCK", "").strip() or "/var/run/docker.sock"
DOCKER_FLAGS = os.environ.get("DOCKER_FLAGS", "").strip()
DOCKER_CMD = os.environ.get("DOCKER_CMD", "").strip() or "docker"
LEGACY_DOCKER_CLIENT = is_env_true("LEGACY_DOCKER_CLIENT")
FORWARD_EDGE_INMEM = True
EDGE_BIND_HOST = os.environ.get("EDGE_BIND_HOST", "").strip() or "127.0.0.1"
EDGE_PORT = int(os.environ.get("EDGE_PORT") or 0) or DEFAULT_PORT_EDGE
EDGE_PORT_HTTP = int(os.environ.get("EDGE_PORT_HTTP") or 0)
EDGE_FORWARD_URL = os.environ.get("EDGE_FORWARD_URL", "").strip()
DOCKER_BRIDGE_IP = os.environ.get("DOCKER_BRIDGE_IP", "").strip()
ENABLE_CONFIG_UPDATES = is_env_true("ENABLE_CONFIG_UPDATES")
DISABLE_CORS_CHECKS = is_env_true("DISABLE_CORS_CHECKS")
DISABLE_CUSTOM_CORS_S3 = is_env_true("DISABLE_CUSTOM_CORS_S3")
DISABLE_CUSTOM_CORS_APIGATEWAY = is_env_true("DISABLE_CUSTOM_CORS_APIGATEWAY")
EXTRA_CORS_ALLOWED_HEADERS = os.environ.get("EXTRA_CORS_ALLOWED_HEADERS", "").strip()
EXTRA_CORS_EXPOSE_HEADERS = os.environ.get("EXTRA_CORS_EXPOSE_HEADERS", "").strip()
EXTRA_CORS_ALLOWED_ORIGINS = os.environ.get("EXTRA_CORS_ALLOWED_ORIGINS", "").strip()
DISABLE_EVENTS = is_env_true("DISABLE_EVENTS")
DEBUG_ANALYTICS = is_env_true("DEBUG_ANALYTICS")