Hi, when I use the latest version I get an error when calling a Lambda. 

I get this error:
Lambda process returned error status code: 1. Output:
awssvc           | 2019-05-10T22:23:19.822966331Z Got permission denied while trying to connect to the Docker daemon socket at unix:///var/run/docker.sock: Post http://%2Fvar%2Frun%2Fdocker.sock/v1.29/containers/create: dial unix /var/run/docker.sock: connect: permission denied
awssvc           | 2019-05-10T22:23:19.822969899Z must specify at least one container source

I'am using the Lambda in a docker. 

You can find my setup here: https://github.com/blaart/stream-my-changes
After forcing to use the 0.9.1 version all works fine again.  

custom_backend_url = os.environ.get('%s_BACKEND' % service_name.upper())
    backend_url = custom_backend_url or ('http://%s:%s' % (DEFAULT_BACKEND_HOST, default_backend_port))
    return start_proxy(port, backend_url=backend_url, update_listener=update_listener, quiet=quiet, params=params)
def start_proxy(port, backend_url, update_listener, quiet=False, params={}):
    proxy_thread = GenericProxy(port=port, forward_url=backend_url,
        ssl=USE_SSL, update_listener=update_listener, quiet=quiet, params=params)
    proxy_thread.start()
    TMP_THREADS.append(proxy_thread)
    return proxy_thread
def start_moto_server(key, port, name=None, backend_port=None, asynchronous=False, update_listener=None):
    moto_server_cmd = '%s/bin/moto_server' % LOCALSTACK_VENV_FOLDER
    if not os.path.exists(moto_server_cmd):
        moto_server_cmd = run('which moto_server').strip()
    if USE_SSL and not backend_port:
        backend_port = get_free_tcp_port()
    cmd = 'VALIDATE_LAMBDA_S3=0 %s %s -p %s -H %s' % (moto_server_cmd, key, backend_port or port, constants.BIND_HOST)
    if not name:
        name = key
    print('Starting mock %s (%s port %s)...' % (name, get_service_protocol(), port))
    if backend_port:
        start_proxy_for_service(key, port, backend_port, update_listener)
    return do_run(cmd, asynchronous)
def start_local_api(name, port, method, asynchronous=False):