feat: add classroomio's server to the monorepo (#168)

* add classroomio server to apps

* ReadME upadte

* Update README.md

* rename project to backend

* fix lock file

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Co-authored-by: Rotimi Best <best@classroomio.com>

apps/backend/src/utils/genUniqueId.js

@@ -0,0 +1,3 @@
+module.exports = () => {
+  return Date.now().toString(36) + Math.random().toString(36).substr(2);
+};