add docker api version negotiation

Author: pfandzelter

pkg/docker/handler.go

@@ -47,7 +47,7 @@ type DockerBackend struct {
 
 func New(tinyFaaSID string) *DockerBackend {
 	// create docker client
-	client, err := client.NewClientWithOpts(client.FromEnv)
+	client, err := client.NewClientWithOpts(client.FromEnv, client.WithAPIVersionNegotiation())
 	if err != nil {
 		log.Fatalf("error creating docker client: %s", err)
 		return nil