Our application architecture will be relatively straightforward—we will use the extremely popular React.js framework for our frontend code, and then we will use the powerful Gin framework for our backend code. Gin comes with a wide array of useful packages that we will be using to build our web application. We will also make use of the Go object-relational mapping (GORM) package, which is one of the most popular object-relational mapping (ORM) layers in the Go language:

We'll build our application piece by piece, starting from the frontend, and then moving to the backend. We will cover some very important concepts in the world of modern web applications, such as reactive UIs, RESTful APIs, security, ORMs, credit card handling, testing, benchmarking, and more. 

As we cover these different topics, we'll cover the majority of the code involved in building the application. 

In the next section, we'll take a tour to discover the outline of this book, and what each chapter will cover.