After cloning the repo and running: `docker build -t localstack:latest .`
I can see the following errors:

```
Starting mock Lambda service (http port 4574)...
ERROR: Error forwarding request: HTTPConnectionPool(host='127.0.0.1', port=4564): Max retries exceeded with url: / (Caused by NewConnectionError('<urllib3.connection.HTTPConnection object at 0x7f4c7b4e7c10>: Failed to establish a new connection: [Errno 111] Connection refused',)) Traceback (most recent call last):
  File "/opt/code/localstack/localstack/services/generic_proxy.py", line 216, in forward
    headers=forward_headers, stream=True)
  File "/opt/code/localstack/.venv/lib/python2.7/site-packages/requests/api.py", line 116, in post
    return request('post', url, data=data, json=json, **kwargs)
  File "/opt/code/localstack/.venv/lib/python2.7/site-packages/requests/api.py", line 60, in request
    return session.request(method=method, url=url, **kwargs)
  File "/opt/code/localstack/.venv/lib/python2.7/site-packages/requests/sessions.py", line 524, in request
    resp = self.send(prep, **send_kwargs)
  File "/opt/code/localstack/.venv/lib/python2.7/site-packages/requests/sessions.py", line 637, in send
    r = adapter.send(request, **kwargs)
  File "/opt/code/localstack/.venv/lib/python2.7/site-packages/requests/adapters.py", line 516, in send
    raise ConnectionError(e, request=request)
ConnectionError: HTTPConnectionPool(host='127.0.0.1', port=4564): Max retries exceeded with url: / (Caused by NewConnectionError('<urllib3.connection.HTTPConnection object at 0x7f4c7b4e7c10>: Failed to establish a new connection: [Errno 111] Connection refused',))
```

I see the same thing when running `localstack start --docker` which is what I originally tried as I would like to use localstack for development purposes in an existing stack.

MacOS Mojave 10.14
Docker for Mac: 18.06.1-ce-mac73 (26764)
import os
import re
import sys
import time
import signal
import traceback
import logging
import boto3
import subprocess
import six
import warnings
import pkgutil
from localstack import constants, config
from localstack.constants import (ENV_DEV, DEFAULT_REGION, LOCALSTACK_VENV_FOLDER,
    DEFAULT_PORT_S3_BACKEND, DEFAULT_PORT_APIGATEWAY_BACKEND,
    DEFAULT_PORT_SNS_BACKEND, DEFAULT_PORT_CLOUDFORMATION_BACKEND)
from localstack.config import (USE_SSL, PORT_ROUTE53, PORT_S3,
    PORT_FIREHOSE, PORT_LAMBDA, PORT_SNS, PORT_REDSHIFT, PORT_CLOUDWATCH,
    PORT_DYNAMODBSTREAMS, PORT_SES, PORT_ES, PORT_CLOUDFORMATION, PORT_APIGATEWAY,
    PORT_SSM, PORT_SECRETSMANAGER)
from localstack.utils import common, persistence
from localstack.utils.common import (run, TMP_THREADS, in_ci, run_cmd_safe,
    TIMESTAMP_FORMAT, FuncThread, ShellCommandThread, mkdir)
from localstack.utils.analytics import event_publisher