OpenSource : 5.42 Explain everything related to `NATS`

[Aryamanz29]

Description :

• Explain everything related to NATS

  Note :

• Changes should be made inside the Open_Source/ directory & Opensource branch.

• Put your doc inside section-5

• Issue only for GWOC'21 contributors.

• Issue will be assigned on a first come first serve basis, 1 Issue == 1 PR == 1 Contributor

• For Contributor please don't create the same issue again, before creating any issue do visit OpenSource Milestone

• Doc name should same as the issue title

Must Follow : Contributing Guidelines & Code of Conduct before start Contributing.

Happy Contributing 🙌

[LegendSumeet]

assign me to these @Aryamanz29

[AdityaStark7]

Hey! I would like to contribute on this issue Batch: 03

[Aryamanz29]

@AdityaStark7 Assigning this to you, Happy Learning 🎉🎉