Add link to XML file.

README.md

@@ -31,6 +31,10 @@ Demo: https://gatsby-starter-wordpress.netlify.com/
 
 This plugin uses [gatsby-plugin-purgecss](https://www.gatsbyjs.org/packages/gatsby-plugin-purgecss/) and [bulma](https://bulma.io/). The bulma build would otherwise be ~170K which adds 170K to each of your built HTML pages. However, with purgecss this is reduced 90%.
 
+## WordPress Setup
+
+Check the [gatsby-source-wordpress](https://github.com/gatsbyjs/gatsby/tree/master/packages/gatsby-source-wordpress) plugin for more information. If you want to copy the demo content, you can grab the [WordPress XML export here](https://wpdemo.gatsbycentral.com/gatsbystarterwordpress.WordPress.2019-09-12.xml) and import it into your WordPress site as a starting point.
+
 ## Contributors
 
 This starter was forked from the netlify starter by the