Learn how to build a secure blog application using React, Gatsby, and Netlify in this 31-minute screencast. Follow along as the instructor guides you through installing the Gatsby CLI, setting up Netlify CMS, adding your blog to GitHub, and creating essential components like the blogroll. Discover how to implement Markdown support, set up user authentication with Okta's signin widget, and handle account logic. Gain insights into running and configuring Gatsby for optimal performance. Access additional resources, including a detailed blog post and demo script, to further enhance your learning experience.