[Docs]: Format LICENSE.md file so that GitHub recognizes it.

[lotyp]

Issue

Currently GitHub shows license type as "other" https://github.com/buggregator/server/blob/master/LICENSE

What to change:

GitHub supports BSD-4. To fix problem default file formatting should be applied to this file.

https://github.com/github/choosealicense.com/blob/gh-pages/_licenses/bsd-4-clause.txt