What is Gatsby?
Gatsby is a modern static PWA (Progressive Web App) site generator based on React and GraphQL. Gatsby.js uses GraphQL to share data across pages. At build time Gatsby will resolve the query and embed the data needed in the page.
The framework has 25000+ stars on it's GitHub repository.
Announcing Gatsby 2.0.0
Learn more about the fetaures here - Gatsby 2.0.0