This book is an easy, hands-on introduction to the creation of web applications from the ground up. Each chapter covers a particular part of an application, introducing you to modern techniques and architectural patterns for achieving it - with a practical focus on the most popular tools, libraries, and frameworks used by today's full-stack developers. You'll learn to build an entire application from start to finish, from creating a Node.js server, to developing a front-end interface with React.js components and Next.js pages. You'll then expand your web application by writing REST and GraphQL APIs, implementing middleware, and connecting your application to a MongoDB database on the back end. Finally, you'll learn how to add OAuth authorization to your application, write automated tests with Jest, and deploy your project as microservices using Docker. You'll learn: Contemporary best practices, like the use of a microservice architecture and test-driven development techniques, essential concepts of the tools, frameworks, and full-stack technologies, and how to use them, steps for creating a full-stack web application - from React.js components on the front end, to GraphQL APIs in the middleware and the MongoDB database on the back end, how to add OAuth authorization to integrate login with GitHub and write automated tests with Jest.