update readme

Author: nicnocquee

README.md

@@ -1,3 +1,5 @@
+## About
+
 This is a sample project that shows how to test async React Server Components in Next.js using
 
 - this gist: https://gist.github.com/sroebert/a04ca6e0232a4a60bc50d7f164f101f6
@@ -12,6 +14,12 @@ The component that is being tested is a [Greeting](./src/app/greeting.tsx) compo
 
 ## Running the tests
 
+The test file can be found in [greeting.test.tsx](./src/app/greeting.test.tsx).
+
 ```bash
 npm run test
 ```
+
+## Blog Post
+
+Read the blog post [here](https://nico.fyi/blog/how-to-test-react-server-component).