CRUD OPERATIONS - Prices
GET '/prices/:id/'
POST '/prices'
{companyId: integer, price_date: date, price: string}
PUT '/prices/:id'
{price: string}
DELETE '/prices/:id'
CRUD OPERATIONS - Companies
GET /companies/:id'
POST '/companies'
{name: string}
PUT '/companies/:id'
{name: string}
DELETE '/companies/:id'