// API explained The API has 3 entities: caregivers, customers and services.

The data structure is following:

• Caregiver: name + surname + gender +
• Customer: name + surname + gender + birth_date + services
• Service: name + type

// --------------------------------- // SERVICES // Lists all services GET api/services

// Lists all services of a given type GET api/services ? type=[TYPE]

// Show one service GET api/services/:serviceId

// Modify one service PUT api/services/:serviceId

// Creates one service POST api/services

// --------------------------------- // CAREGIVERS // Lists all caregivers GET api/caregivers

// Show one caregiver GET api/caregivers/:caregiverId

// Modify one caregiver PUT api/caregivers/:caregiverId

// Creates one caregiver POST api/caregivers

// --------------------------------- // CUSTOMERS // Lists all customers GET api/customers

// Show one customer GET api/customers/:customerId

// Modify one customer PUT api/customers/:customerId

// Creates one customer POST api/customers

// Adds a service to one customer POST api/customers/:customerId/addService ? serviceId=[ID]

// Removes a service from one customer POST api/customers/:customerId/addService ? serviceId=[ID]