Security concepts go beyond frameworks and applications in general. There are various strategies employed to secure both the frontend and backend. Solutions can range from OAuth to JSON Web Tokens (JWT) and more. As of now, our backend service doesn't have a security mechanism in place. We will look at security, which is better covered in the chapter aptly titled Securing the application.
There are identity platforms that can be leveraged to build security for our application. One such platform is Auth0, which solves identity use cases. The single-page application can follow an OAuth based-flow or use JWT token-based authentication for its authentication and authorization needs.
For our backend project, we will be using JWT for backend/API validation and for the frontend app we will store the issued token and pass it during each HTTP call. In this...