Dummy API in Golang language

Just for exercising Golang fundaments.

API implemented using the Gin framework.

This is a WIP project

• GET /books: Retrieve all books
• POST /books: Post a new book
• GET /books/{id}: Retrive book with ID id`
• PATCH /books/{id}/checkout: Checkout book with ID id
• PATCH /books/{id}/return: Return book with ID id