What have been done:

1. Studied about Mongo DB.
   MongoDB is a no-SQL, distributed, file-based DB. Basic concepts and commands:
   database
   show databases
   collection
   show collections
   object
   db.{collection name}.find()
db.{collection name}.findOne()

2. Discussed what data to store in DB.
   mandatory:
   effective date
   expiry date
   optional:
   approved date
   approved duration level

3. Discussed spring injection.