Add HTTP status to docker error

gns3server/modules/docker/__init__.py

@@ -105,7 +105,7 @@ class Docker(BaseManager):
             except ValueError:
                 pass
             log.debug("Query Docker %s %s params=%s data=%s Response: %s", method, path, params, data, body)
-            raise DockerError("Docker has returned an error: {}".format(body))
+            raise DockerError("Docker has returned an error: {} {}".format(response.status, body))
         return response
 
     @asyncio.coroutine