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 sys
import ssl
import socket
import inspect
import logging
import traceback
import requests
from flask_cors import CORS
from requests.structures import CaseInsensitiveDict
from requests.models import Response, Request
from six import iteritems
from six.moves.socketserver import ThreadingMixIn
from six.moves.urllib.parse import urlparse
from six.moves.BaseHTTPServer import BaseHTTPRequestHandler, HTTPServer
from localstack.config import TMP_FOLDER, USE_SSL
from localstack.constants import ENV_INTERNAL_TEST_RUN
from localstack.utils.common import FuncThread, generate_ssl_cert, to_bytes
QUIET = False
SERVER_CERT_PEM_FILE = '%s/server.test.pem' % (TMP_FOLDER)
CORS_ALLOWED_HEADERS = ('authorization', 'content-type', 'content-md5', 'cache-control',
    'x-amz-content-sha256', 'x-amz-date', 'x-amz-security-token', 'x-amz-user-agent')
CORS_ALLOWED_METHODS = ('HEAD', 'GET', 'PUT', 'POST', 'DELETE', 'OPTIONS', 'PATCH')
LOGGER = logging.getLogger(__name__)
class ThreadedHTTPServer(ThreadingMixIn, HTTPServer):