update readme

Author: lukehaas

CHANGELOG.md

@@ -1,3 +1,6 @@
+### Version 2.12.1 - 21 May 2024
+- Fix an issue that caused file content to be loaded twice when opening a file.
+
 ### Version 2.12.0 - 24 April 2024
 - Improved support for ES modules
 - Updated build options to move away from Babel naming conventions

README.md

@@ -1,10 +1,32 @@
-# [RunJS](https://runjs.app)
+<p align="center">
+  <a href="https://runjs.app">
+    <img src="docs/icon.png" height="128">
+    <h1 align="center">RunJS</h1>
+  </a>
+</p>
 
 ![Twitter Follow](https://img.shields.io/twitter/follow/runjs_app?style=social)
 
 ![image](docs/github-promo.png)
 
-Download the latest release [here](https://github.com/lukehaas/runjs/releases).
+[RunJS](https://runjs.app) is a playground for JavaScript and TypeScript. It runs your code automatically and shows you instant results.
+
+## Why RunJS?
+
+- An isolated space to run code experiments 🔬
+- Great for learning and teaching 🧑‍🏫
+- Support for code completion, type checking and documentation on hover ⚡️
+- Easily install NPM packages 🚀
+- Save snippets and build a snippet library 🧑‍💻
+- Includes access to Node.js and Browser APIs 🖥️
+
+Download the latest release [here](https://runjs.app/releases/latest).
+
+## Links
+- [Website](https://runjs.app)
+- [Documentation](https://runjs.app/docs)
+- [Issue tracker](https://github.com/lukehaas/RunJS/issues)
+- [Support](mailto:[email protected])
 
 ## Feature Highlights