Exercise - Spring Boot - CRUD

• write a Spring Boot application with the necessary dependencies that:
  • has an entity called Car with the following columns:
    • an id
    • a modelName
    • a type
  • has a dedicated repository for the Car
  • has a dedicated controller for the Car that:
    • is mapped on cars
    • executes the following CRUD operations:
      • create a new Car
      • return a list of all the Cars
      • return a single Car - if the id is not in the db (use existsById()), returns an empty Car
      • updates the type of a specific Car, identified by id and passing a query param - if not present in the db, returns an empty Car
      • deletes a specific Car - if absent, the response will have a Conflict HTTP status
      • deletes all the Cars in the db
• test the endpoints using Postman for:
  • creating 2 different cars
  • retrieving all the cars
  • retrieving a car by the id
  • trying to retrieve an absent car
  • updates the type of a specific Car
  • trying to update an absent car
  • deleting a specific Car
  • trying to delete an absent Car
  • deleting all the db
• note for reviewers: view CarCRUD.postman_collection.json in the root folder for all the Postman calls