make runapi make rungateway

Endpoints para teste:

  curl -X POST -d '{"name": "foo", "price": 10.20}' localhost:8081/api/v1/add
  curl -X POST -d '{"name": "bar", "price": 5.10}' localhost:8081/api/v1/add
  curl localhost:8081/api/v1/list
  curl -X DELETE "localhost:8081/api/v1/delete/<ID do foo>"
  curl localhost:8081/api/v1/list