docs: add more information to the readme (#158)

Author: MegaRedHand

README.md

@@ -1,5 +1,24 @@
-# Network Simulator
+# GEduNet 🌐
+
+_GEduNet_ is an Graphical Educational Computer Network Simulator.
+It's meant as an aid to students trying to understand computer networks, along with their teachers.
+
+The project runs on the browser and is hosted in GitHub Pages.
+You can access it [here](https://megaredhand.github.io/network-simulator/).
+
+## How to use
+
+🏗️ This part is a work-in-progress 🏗️
+
+![Preview of the simulator. Shows multiple hosts, routers and switches. Some network packets are being sent through the network.](./img/full-preview.png)
+
+Pressing one of the buttons on the left bar adds the device shown on the image to the network.
+The right bar presents information on the currently selected device.
+
+## Development
 
 To run the local development server, use `npm run start`
 
 For building the artifacts, use `npm run build`
+
+For checking code format and lint, use `npm run lint`