- SPA and Add react router dom
- npm i react-router-dom

- pages -> create , delete , edit , home , show
- show booklist in react
- npm i axios react-icons
- Component - Spinner , BackButton 
- home - table -> title , author , publishYear , BsInfoCircle , AiOutlineEdit , MdOutlineDelete 
- BsInfoCircle -> Show Book Details in React . 
-Create Book In React

- npm init -> package.json
- index.js
- mongodb connect -> mongoose.connect() -> promise
- app.listen
- router middleware
- express.router()
- controller
- get , post , put , delete 
- postman 
- express.json()
- cors