book: add Build a blockchain from scratch in Go with gRPC (#5444)

A foundational and practical guide for effectively learning the fundamental blockchain concepts and progressively building a blockchain from scratch in Go with gRPC. An interesting and challenging adventure that takes you from the foundational concepts and purpose through the technical design and implementation to the practical testing and usage of the proposed blockchain

README.md

@@ -3541,6 +3541,7 @@ _Where to discover new Go libraries._
 
 - [A Go Developer's Notebook](https://leanpub.com/GoNotebook/read)
 - [An Introduction to Programming in Go](http://www.golang-book.com/)
+- [Build a blockchain from scratch in Go with gRPC](https://github.com/volodymyrprokopyuk/go-blockchain) - The foundational and practical guide for effectively learning and progressively building a blockchain from scratch in Go with gRPC.
 - [Build Web Application with Golang](https://astaxie.gitbooks.io/build-web-application-with-golang/content/en/)
 - [Building Web Apps With Go](https://codegangsta.gitbooks.io/building-web-apps-with-go/content/)
 - [Go 101](https://go101.org) - A book focusing on Go syntax/semantics and all kinds of details.