Add new cron service, useful in dev to automatically run scheduled tasks and can be used in single-server deployments to avoid an external dependency

server/services/index.ts

@@ -1,5 +1,6 @@
 import admin from "./admin";
 import collaboration from "./collaboration";
+import cron from "./cron";
 import web from "./web";
 import websockets from "./websockets";
 import worker from "./worker";
@@ -10,4 +11,5 @@ export default {
   admin,
   web,
   worker,
+  cron,
 };