input: Write a python function to get a product's details using Flask and jsonify.
  assert get_product() == {
      'productId': '1234',
      'name': 'Apple iPhone 11 Pro Max',
      'price': '$999.99',
      'description': 'The latest iPhone from Apple with powerful A13 Bionic chip, triple camera lens, and more'
  }
output: from flask import Flask, jsonify
  
  app = Flask(__name__)
  
  @app.route('/product')
  def get_product():
      product = {
          'productId': '1234',
          'name': 'Apple iPhone 11 Pro Max',
          'price': '$999.99',
          'description': 'The latest iPhone from Apple with powerful A13 Bionic chip, triple camera lens, and more'
      }
      return jsonify(product)