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.  

import os
import re
import sys
import json
import time
import signal
import traceback
import logging
import boto3
import subprocess
import six
import warnings
import pkgutil
from requests.models import Response
from localstack import constants, config
from localstack.constants import (
    ENV_DEV, DEFAULT_REGION, LOCALSTACK_VENV_FOLDER,
    DEFAULT_PORT_APIGATEWAY_BACKEND, DEFAULT_PORT_SNS_BACKEND, DEFAULT_PORT_IAM_BACKEND)
from localstack.config import USE_SSL
from localstack.utils import common, persistence
from localstack.utils.common import (run, TMP_THREADS, in_ci, run_cmd_safe, get_free_tcp_port,
    TIMESTAMP_FORMAT, FuncThread, ShellCommandThread, mkdir, get_service_protocol, docker_container_running)
from localstack.utils.analytics import event_publisher
from localstack.services import generic_proxy, install
from localstack.services.es import es_api
from localstack.services.firehose import firehose_api
from localstack.services.awslambda import lambda_api
from localstack.services.generic_proxy import GenericProxy, GenericProxyHandler
from localstack.services.dynamodbstreams import dynamodbstreams_api
SIGNAL_HANDLERS_SETUP = False