Learn to build a secure weight tracker web application and API using Node.js, PostgreSQL, and hapi.js in this comprehensive 2-hour and 21-minute tutorial. Explore the process of creating a Node.js project, installing necessary modules and dependencies, setting up routes, and launching the application. Dive into Docker installation, PostgreSQL configuration, and client code implementation. Gain insights into user authentication by integrating Okta for secure sign-up and login functionality. Access the provided source code and accompanying blog post for additional resources and in-depth explanations.