updated to use the push API and the oauth authentication for posting. Should record the subscription ID and endpoint for subscribers in Mongo as well, though not tested that fully and have no way yet to manage these subscriptions. IE It still pushes to a single printer, I have just got the code from the sign up. It should check statuses which should inform if someone has unsubscribed etc, as well as log properly if it has printed somewhere. Also should be able to differentiate which message goes to which subscrioption ID. To be useful will still need to sort out config options to select postcode / borough.