Merge pull request #855 from dineshgowda24/patch-1

Add KV store

README.md

@@ -134,6 +134,7 @@ It's a great way to learn.
 * [**Python**: _DBDB: Dog Bed Database_](http://aosabook.org/en/500L/dbdb-dog-bed-database.html)
 * [**Python**: _Write your own miniature Redis with Python_](http://charlesleifer.com/blog/building-a-simple-redis-server-with-python/)
 * [**C++**: _Build Your Own Redis from Scratch_](https://build-your-own.org/redis)
+* [**Ruby**: _Build your own fast, persistent KV store in Ruby_](https://dinesh.wiki/posts/build-your-own-persistent-kv-store/)
 
 #### Build your own `Docker`