HW 2020-09-15 Creating a simple microservice with 3 operations

[sergeylukichev]

A service which maintains items where each item consists of a id, name, size (S, M, L, XL) Implement a simple service with 3 operations:

1. add an item
2. get a list of items
3. get an item by id

Use controller, service and persistence (repository) layers.