Added demo

Signed-off-by: Hans Kokx <hans.d.kokx@gmail.com>

README.md

@@ -3,6 +3,8 @@
 This small Python script and .desktop file add a quick toggle to the desktop
 environment's system tray.
 
+![NextDNS Tray demo](nextdns_tray_demo.png "NextDNS Tray demo")
+
 ## Prerequisites
 
 1. **NextDNS CLI**: The script controls the nextdns service. If you haven't installed it yet:
@@ -11,7 +13,7 @@ environment's system tray.
 sh -c 'curl -sL https://nextdns.io/install | sh'
 ```
 
-1. **Python 3 & PyQt6**: The interface is built using Python 3 and the Qt6
+2. **Python 3 & PyQt6**: The interface is built using Python 3 and the Qt6
    toolkit. (This is installed by default on (K)ubuntu.)
 
 ```bash
@@ -19,7 +21,7 @@ sudo apt update
 sudo apt install python3 python3-pyqt6
 ```
 
-1. **Polkit Agent**: The script uses pkexec to handle start/stop commands safely. Most desktop environments (KDE, GNOME, XFCE) come with this pre-installed.
+3. **Polkit Agent**: The script uses pkexec to handle start/stop commands safely. Most desktop environments (KDE, GNOME, XFCE) come with this pre-installed.
 
 ## Installation
 
@@ -34,13 +36,13 @@ cp home/.local/share/applications/nextdns-tray.desktop ~/.local/share/applicatio
 cp home/.local/share/icons/nextdns.png ~/.local/share/icons/
 ```
 
-1. **Make the script executable**
+2. **Make the script executable**
 
 ```bash
 chmod +x ~/.local/bin/nextdns-tray
 ```
 
-1. **(Optional) Add to Autostart**: If you want the tray to start automatically when you log in:
+3. **(Optional) Add to Autostart**: If you want the tray to start automatically when you log in:
 
 ```bash
 mkdir -p ~/.config/autostart