Gatsby and MDX make a great pairing. Here's how to set up a new project with gatsby-mdx to write pages and other content using MDX.
gatsby-mdx deprecated and now replaced by
gatbsy-plugin-mdx? I found docs a bit confusing.
gatsby-mdx is the pre-1.0 version of gatsby-plugin-mdx. At 1.0 it was merged into the Gatsby monorepo and the name was changed.