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

• Middleware

• Guards

• Interceptors

• Pipes

• Exception Filters

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.

Here's the Github repo if you want to check out the full code:
https://github.com/tomwray13/emoji-generator

And here's the deployed app if you want to give it a spin in Postman:
emoji-generator-production.up.railway.app

You'll need to pass in the header x-api-key with value SECRET to pass the API key authentication.