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)
streams = dynamodbstreams.list_streams()
    ddb_event_source_arn = None
    for stream in streams['Streams']:
        if stream['TableName'] == TEST_TABLE_NAME:
            ddb_event_source_arn = stream['StreamArn']
    assert ddb_event_source_arn
    
    zip_file = testutil.create_lambda_archive(load_file(TEST_LAMBDA_PYTHON), get_content=True,
        libs=TEST_LAMBDA_LIBS, runtime=LAMBDA_RUNTIME_PYTHON27)
    testutil.create_lambda_function(func_name=TEST_LAMBDA_NAME_DDB,
        zip_file=zip_file, event_source_arn=ddb_event_source_arn, runtime=LAMBDA_RUNTIME_PYTHON27)
    
    assert_raises(Exception, testutil.create_lambda_function, func_name=TEST_LAMBDA_NAME_DDB,
        zip_file=zip_file, event_source_arn=ddb_event_source_arn, runtime=LAMBDA_RUNTIME_PYTHON27)
    
    kinesis_event_source_arn = kinesis.describe_stream(
        StreamName=TEST_LAMBDA_SOURCE_STREAM_NAME)['StreamDescription']['StreamARN']
    testutil.create_lambda_function(func_name=TEST_LAMBDA_NAME_STREAM,
        zip_file=zip_file, event_source_arn=kinesis_event_source_arn, runtime=LAMBDA_RUNTIME_PYTHON27)
    
    sqs_queue_info = testutil.create_sqs_queue(TEST_LAMBDA_NAME_QUEUE)
    testutil.create_lambda_function(func_name=TEST_LAMBDA_NAME_QUEUE,
        zip_file=zip_file, event_source_arn=sqs_queue_info['QueueArn'], runtime=LAMBDA_RUNTIME_PYTHON27)
    
    num_events_ddb = 15
    num_put_new_items = 5
    num_put_existing_items = 2
    num_batch_items = 3
    num_updates_ddb = num_events_ddb - num_put_new_items - num_put_existing_items - num_batch_items