Websocket Support (#937)

* Atom / RSS meta link

* Spike

* Feeling good about this spike now

* Remove document.collection

* Remove koa.ctx from all presenters to make them portable outside requests

* Remove full serialized model from events
Move events.add to controllers for now, will eventually be in commands

* collections.create event
parentDocument -> parentDocumentId

* Fix up deprecated tests

* Fixed: Doc creation

* documents.move

* Handle collection deleted

* 💚

* Authorize room join requests

* Move starred data structure
Account for documents with no context on sockets

* Add socket.io-redis

* Add WEBSOCKETS_ENABLED env variable to disable websockets entirely for self hosted
New installations will default to true, existing installations to false

* 💚 No need for promise response here

* Reload notice

server/utils/onboarding.js

@@ -24,7 +24,7 @@ Outline features an [API](https://www.getoutline.com/developers) for programatic
 const newDocument = {
   title: 'Getting started with codebase',
   text: 'All the information needed in Markdown',
-  collection: '${collectionId}',
+  collectionId: '${collectionId}',
   token: 'API_KEY', // Replace with a value from https://www.getoutline.com/settings/tokens
 };