How to build a comment system for Gatsby using GitHub Issues

The article provides a comprehensive guide on creating a comment system for a Gatsby blog using GitHub Issues, allowing for interaction between blog readers and authors without the need for third-party paid services like Commento or Disqus. The process involves setting up GitHub authentication through a custom server using Passport.js, which manages user sessions safely and efficiently. Users can comment on blog posts if authenticated, and their comments are stored as GitHub Issues. The tutorial details the technical workflow, such as checking user authentication, creating GitHub issues if they don't exist, and posting comments, along with the necessary code snippets and explanations on setting up components and fetching user data. Additionally, it highlights possible enhancements like adding reactions and spam filtering to improve the comment system further.