Quick question about subscriptions - no matter if I run my app on localhost or a server, I always run into the

No 'Access-Control-Allow-Origin' header is present on the requested resource. Origin '...' is therefore not allowed access. The response had HTTP status code 400. If an opaque response serves your needs, set the request's mode to 'no-cors' to fetch the resource with CORS disabled.

Is there a way to configure this on the subscriptions.graphcool side so that the relevant header is included in the response?