add custom 404 page

data/blog/introducing-tailwind-nextjs-starter-blog.mdx

@@ -1,7 +1,7 @@
 ---
 title: 'Introducing Tailwind Nexjs Starter Blog'
-date: '2021-01-11'
-tags: ['nextjs', 'tailwind', 'guide']
+date: '2021-01-12'
+tags: ['next-js', 'tailwind', 'guide']
 draft: false
 summary: 'Looking for a performant, out of the box template, with all the best in web technology to support your blogging needs? Checkout the Tailwind Nextjs Starter Blog template.'
 ---
@@ -37,6 +37,14 @@ I wanted it to be nearly as feature-rich as popular blogging templates like [bea
 - Support for tags - each unique tag will be its own page
 - SEO friendly with RSS feed, sitemaps and more!
 
+## Sample posts
+
+- [A markdown guide](/blog/github-markdown-guide)
+- [Learn more about images in Next.js](/blog/guide-to-using-images-in-nextjs)
+- [A tour of math typesetting](/blog/deriving-ols-estimator)
+- [Simple MDX image grid](/blog/pictures-of-canada)
+- [Example of long prose](/blog/the-time-machine)
+
 ## Quick Start Guide
 
 1. Fork this project