chore: add blog post link to README

README.md

@@ -2,7 +2,7 @@
 
 This repository contains all the code referenced in the following blog post:
 
-- [...](...)
+- [Getting started with Luzmo Data Visualisation and Next.js](https://www.luzmo.com/blog/data-visualization-nextjs-luzmo)
 
 To use this code you'll need two environment variables provided by [Luzmo](https://www.luzmo.com/). The steps for how to create them are covered in the blog post.