Task project

Prerequisites

• Node.js v20

Project structure

web

Web application written in React (bootstrapped from Create React App). Runs on http://localhost:3000. Uses React Redux Toolkit for state management.

api

Simple vanilla Node.js backend server for REST API. Runs on http://localhost:8000. Available endpoints:

• /users/register POST

  Request: { email: string, password: string }

  Response: { id: string, email: string, balance: number }

  Error: { error: string }

• /users/login POST

  Request: { email: string, password: string }

  Response: { id: string, email: string, balance: number }

  Error: { error: string }

• /users/acount/top-up

  Request: { userId: string, amount: number }

  Response: { newBalance: number }

  Error: { error: string }

contract

Contains TypeScript type definitions shared by web and api.

Scripts

• npm run api - start backend server (localhost:8000)
• npm run web - start web app server (localhost:3000)
• npm run test - run unit tests