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

webpack.config.js

@@ -17,7 +17,8 @@ const definePlugin = new webpack.DefinePlugin({
   'process.env': {
     URL: JSON.stringify(process.env.URL),
     SLACK_KEY: JSON.stringify(process.env.SLACK_KEY),
-    SUBDOMAINS_ENABLED: JSON.stringify(process.env.SUBDOMAINS_ENABLED === 'true')
+    SUBDOMAINS_ENABLED: JSON.stringify(process.env.SUBDOMAINS_ENABLED === 'true'),
+    WEBSOCKETS_ENABLED: JSON.stringify(process.env.WEBSOCKETS_ENABLED === 'true')
   }
 });