express API crud , with mongodb storage point is Mongodb
base: https://stock-backend-express.herokuapp.com/ url:api/stock/ api link = base + url get all : /all testing with postman: api/all delete: :/id testing with postman:api/{id} update: :/id testing with postman:api/{id} save stock: /add testing with postman:api/add
example: https://stock-backend-express.herokuapp.com/api/stock/all to get all stock