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.  

x_forwarded_for = headers.get('X-Forwarded-For')
        client_address = self.client_address[0]
        server_address = ':'.join(map(str, self.server.server_address))
        if x_forwarded_for:
            x_forwarded_for_list = (x_forwarded_for, client_address, server_address)
        else:
            x_forwarded_for_list = (client_address, server_address)
        return ', '.join(x_forwarded_for_list)
    def forward(self, method):
        path = self.path
        if '://' in path:
            path = '/' + path.split('://', 1)[1].split('/', 1)[1]
        proxy_url = '%s%s' % (self.proxy.forward_url, path)
        target_url = self.path
        if '://' not in target_url:
            target_url = '%s%s' % (self.proxy.forward_url, target_url)
        data = self.data_bytes
        forward_headers = CaseInsensitiveDict(self.headers)
        
        if not forward_headers.get('Host'):
            forward_headers['host'] = urlparse(target_url).netloc
        if 'localhost.atlassian.io' in forward_headers.get('Host'):
            forward_headers['host'] = 'localhost'
        forward_headers['X-Forwarded-For'] = self.build_x_forwarded_for(forward_headers)
        try:
            response = None