
An opinionated set of integrated themes and starters as a boilerplate to accelerate development with GatsbyJS
The Gatsby Theme Catalyst is a deprecated theme that will not receive updates for Gatsby v4. However, the documentation for the theme can still be found on the website and the developer will continue to address any issues as necessary.
In summary, the Gatsby Theme Catalyst is a deprecated theme that will not receive updates for Gatsby v4. Despite this, users can still access the theme's documentation and the developer will continue to address any issues. The theme offers easy installation, a responsive design, and customization options.

GatsbyJS is a free and open-source static site generator based on React. It uses a modern development stack including Webpack, GraphQL, and modern JavaScript and CSS frameworks. It also provides a rich set of plugins, starters, and themes.
MDX is a format that allows developers to write JSX within Markdown documents, combining the power of React with the simplicity of Markdown. This allows for the creation of dynamic and interactive content that can be easily shared and consumed across different platforms and devices.