These are resources you should use for lab 3 on Node.js.
sales.sql: is the database dump. You should import this file into your database server to create the database with all tables and their content
daos: contains database management modules to query the database for the two tables of interest
services: conntai modules with the business logic for clients and products
controllers: contains modules for manipulating HTTP Requests and sending HTTP response
apis: defines the example routes (or end points) for which the server provides responses
public: contains static HTML, CSS and image files
views: contais examples of EJS files