API for Book Store
Includes REST API for managing Book's and Client's using GET/POST/PUT/DELETE/PATCH methods.
rentedBooks is determined by Book's with ClientId set, setting them to Client will not update any books.
Book doesn't need to have an active client, history will be updated accordingly when changing ClientId (who has the book) to other Client or null (nobody).
You are free to use this project for your purposes, but if you modify it include the original repository where it came from.