docs: Update README

Author: iker-barriocanal

packages/nextjs/README.md

@@ -1,11 +1,19 @@
-# `nextjs`
+<p align="center">
+  <a href="https://sentry.io" target="_blank" align="center">
+    <img src="https://sentry-brand.storage.googleapis.com/sentry-logo-black.png" width="280">
+  </a>
+  <br />
+</p>
 
-> TODO: description
+# Official Sentry SDK for NextJS
 
-## Usage
+TODO: npm version, npm dm, npm dt, typedoc
+
+## Links
 
-```
-const nextjs = require('nextjs');
+- [Official SDK Docs](https://docs.sentry.io/quickstart/)
+- [TypeDoc](http://getsentry.github.io/sentry-javascript/)
+
+## Usage
 
-// TODO: DEMONSTRATE API
-```
+TODO