Update readme

Author: davidar

README.md

@@ -1,14 +1,6 @@
-# JupyterLite Demo
+# Mathics3 Live
 
-[![lite-badge](https://jupyterlite.rtfd.io/en/latest/_static/badge.svg)](https://jupyterlite.github.io/demo)
-
-JupyterLite deployed as a static site to GitHub Pages, for demo purposes.
-
-## ✨ Try it in your browser ✨
-
-➡️ **https://jupyterlite.github.io/demo**
-
-![github-pages](https://user-images.githubusercontent.com/591645/120649478-18258400-c47d-11eb-80e5-185e52ff2702.gif)
+![screenshot](./screenshot.png)
 
 ## Requirements
 
@@ -17,13 +9,10 @@ JupyterLite is being tested against modern web browsers:
 - Firefox 90+
 - Chromium 89+
 
-## Deploy your JupyterLite website on GitHub Pages
-
-Check out the guide on the JupyterLite documentation: https://jupyterlite.readthedocs.io/en/latest/quickstart/deploy.html
-
 ## Further Information and Updates
 
 For more info, keep an eye on the JupyterLite documentation:
 
+- Deployment: https://jupyterlite.readthedocs.io/en/latest/quickstart/deploy.html
 - How-to Guides: https://jupyterlite.readthedocs.io/en/latest/howto/index.html
 - Reference: https://jupyterlite.readthedocs.io/en/latest/reference/index.html