feat(router.ts): add new handlers for getProduct, getProducts, and updateProduct to improve functionality and modularity of product routes

refactor(server.ts): add middleware function 'protect' to '/api' route for additional security measures

fix(product.ts): fix typo in belongsToId field in createProduct and updateProduct functions

feat(database): add unique constraint on Product model for id and belongsToId fields to prevent duplicate entries

feat(product.ts): add product handlers for getting, creating, updating, and deleting products using Prisma ORM to interact with the database

change db reset prisma and migrate new db

refactor(user.ts): improve error handling and logging in createNewUser and loginUser functions

refactor(update.ts): improve readability and add comments to update validation functions

feat(user.ts): add getUsers handler to retrieve all users

feat(package.json): add express-validator package

feat(router.ts): add updateValidation middleware to delete route in router

feat(validations): add update validations for PUT and POST requests

fix(auth.ts): make createJWT function asynchronous

feat(middleware.ts): add handleInputErrors middleware

refactor(router.ts): add input validation for name field in PUT /product/:id route