To get a postlist for the main listing, and for the rss feed, we need to obtain frontmatter data (title, desc) for all posts
You get this for 'free' with the mdx posts, which have their own frontmatter For jsx posts, you need a transformer
I write a transformer in gatsby node to create CombinedFrontmatter so this is a single list
ToDO:
- fix the sitemap to have correct urls etc https://www.gatsbyjs.com/plugins/gatsby-plugin-sitemap/
- Add an observable page to check it's possible
- Write the homepage/index page which is a listing of the site