add product entity

[tgorella]

Задачи

Server

• [x] Mongoose Model
• [x] Schema
• [x] query resolvers
  • [x] get product by id
  • [x] get all products
• [x] mutation resolvers
  • [x] add
  • [x] delete
  • [x] update

Client

Сущность

• [ ] model / schema
• [x] slice
• [x] services
• [x] selectors

Форма добавления

• [x] сверстать форму
• [ ] настроить логику формы
• [ ] валидация формы

Страницы

• [x] products page
• [x] product details page