Docs: update readme

README.md

@@ -1,3 +1,27 @@
-# whose-turn-is-it
+<h1 align="center">
+    Whose turn is it?
+</h1>
 
-Simple webapp for playing games.
+<p align="center">
+    <a href="https://www.gnu.org/licenses/agpl-3.0">
+        <img src="https://img.shields.io/badge/License-AGPL%20v3-blue.svg" />
+    </a>
+</p>
+
+Simple webapp to keep track of who is currently playing and how much time they have left. Originally designed for [Rummikub](https://de.wikipedia.org/wiki/Rummikub).  
+Please note: this is by no means perfect and just meant to be a simple solution to a simple problem :)
+
+# Featues
+- Create an independent room
+- Play with multiple players across multiple devices
+- Decentralized
+- End-to-end encrypted
+
+# How it works
+The browsers of all players connect to a common MQTT server and communicate through that server. An AES Key is derived from the room name, which is then used to encrypt all communication.
+
+# Technologies
+- [MQTT.js](https://github.com/mqttjs/MQTT.js)
+- [Alpine.js](https://alpinejs.dev/)
+- [Pico.css](https://picocss.com/)
+- [crypto-js](https://github.com/brix/crypto-js)