1) job quee maanage
2) jwt -  private public key
3) aapanel
4) cron job
5) rate limiting
6) server on localhost, without domain
7) mongodb connection
8) controller
9) middleware
10) move env to config.js
11) revice all index in mongoose
12) mongoose version key disable
13) apply possible validation on mongoose
14) foreign key and foreign key constraint in mongoose
15) reduce catch block codes
16) postman doc
17) process audit using debuging
