Get ready to start your NestJS mastery journey.

Through various projects, you'll learn the following techniques and concepts:

• Building a REST API with full CRUD functionality using NestJS Controllers, Middleware & Pipes

• Authentication, Authorization, Guards & Sessions

• Persisting data to a database and cache

• Processing jobs in a queue

• Unit testing, integration testing and end-to-end testing

• Realtime app using Websockets

• Fullstack monorepo

• All projects will include deployment

There are many NestJS tools at your disposal when building an application, specifically:

• Middleware

• Guards

• Interceptors

• Pipes

• Exception Filters

• Decorators

In this project, we’re going to explore the purpose of these tools, how they fit together and the order of their execution in the NestJS lifecycle by building a random emoji generator API.

With this understanding, you’ll have an excellent foundation for building NestJS applications for the projects ahead.

The starter repos will also serve as excellent NestJS starter repos for any future projects you start outside of the course!

Here’s what’s included in the starter repos:

• Adding to the tsconfig.json file

• Setting up the ConfigModule and environment variables for Jest

• Enforcing consistent HTTP response structure

• Configuring some basic HTTP security

• Adding whitelisted validation to the NestJS server

• Setting up NestJS logging

• Docker compose set up for a Postgres database & Redis

• Prisma setup (the ORM we’ll be using in each project to interact with the database)

• Redis and CacheService setup

• Jest config (including env variables)

• Setting up a CI Pipeline using Github Actions

We’re going to build a URL shortening API that’s meant to be used as an internal tool for the company you work for.

E.g. Imagine you work for a startup and you need a URL shortening tool, and you decide to build one instead of paying for an existing solution.

Topics covered:

• REST endpoints with CRUD functionality

• Paginating and filtering a GET request that returns a list

• Validation with DTOs and pipes

• Persisting data to a database

• Basic API key authentication using guards

• Using the config module

• Unit testing, integration testing and end-to-end testing