Build Java Full-stack Spring Boot and React app

There are many tutorials dealing with topics such as spring boot, react.js, react native, etc. So it's usually a challenge to make a tutorial about these themes. Fortunately, most of these tutorials are chunks of code, which can be a trap for beginners when it comes to joining them. So in this series, we are going to learn how to join pieces of code to make a really beautiful project. We think this will help someone on their developer journey!

In this tutorial, we'll set up the backend. What you'll learn here are:

How to initialize a Spring boot app using the official Spring boot initializer and
How to customize a spring boot app port.

We will learn how to :

Create entity
Create a repository and expose it as REST endpoints without using any other controller component
Create queries
Custom query URL
Custom REST API base path

What we'll cover here :
How to customize Spring security to fetch users from the database
How to implement JWT token management in Spring boot REST API
How to expose a REST POST API /login to generate a JWT token