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.  

PLUGINS_LOADED = {}
API_DEPENDENCIES = {
    'dynamodbstreams': ['kinesis'],
    'lambda': ['logs'],
    'es': ['elasticsearch']
}
API_COMPOSITES = {
    'serverless': ['iam', 'lambda', 'dynamodb', 'apigateway', 's3', 'sns']
}
DEFAULT_BACKEND_HOST = '127.0.0.1'
LOG = logging.getLogger(os.path.basename(__file__))
SERVICE_PLUGINS = {}
PLUGIN_SCOPE_SERVICES = 'services'
PLUGIN_SCOPE_COMMANDS = 'commands'
LOG_FORMAT = '%(asctime)s:%(levelname)s:%(name)s: %(message)s'
LOG_DATE_FORMAT = TIMESTAMP_FORMAT
class Plugin(object):
    def __init__(self, name, start, check=None, listener=None):
        self.plugin_name = name
        self.start_function = start
        self.listener = listener
        self.check_function = check
    def start(self, asynchronous):
        kwargs = {
            'asynchronous': asynchronous
        }
        if self.listener:
            kwargs['update_listener'] = self.listener
        return self.start_function(**kwargs)
    def check(self, expect_shutdown=False, print_error=False):