feat: remove defer (#243)

* working on moving the email logic to the backend

* Moved nodemailer to the backend

* uninstall defer

* updated relative import path in tsconfig

* working on the zod validation

* Merge branch 'main' into send-email

* fixed the zod import issue

* fixed the zod import issue

* updated the env example files

* docs: update README.md (#249)

* fix: handle catex error

* chore: remove fly.io github action

* Update README.md

Updated the Readme to reflect changes made to the emailing flow

---------

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

* chore: wrapp up email sending

---------

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

apps/dashboard/tsconfig.json

@@ -16,8 +16,8 @@
     "paths": {
       "$lib": ["./src/lib"],
       "$lib/*": ["./src/lib/*"],
-      "$defer": ["./src/defer"],
-      "$defer/*": ["./src/defer/*"]
+      "$nodemailer": ["./src/nodemailer"],
+      "$nodemailer/*": ["./src/nodemailer/*"]
     }
   }