update readme

README.md

@@ -1,7 +1,10 @@
-# Ubuntu Smoother
-This utility is meant to be used in [Ubuntu Vanilla GNOME](https://github.com/mirkobrombin/ubuntu-vanilla-gnome) 
+<div align="center">
+    <h1>Ubuntu Smoother</h1>
+    <p>This utility is meant to be used in [Ubuntu Vanilla GNOME](https://github.com/mirkobrombin/ubuntu-vanilla-gnome) 
     as a first-setup wizard. It's purpose is to help the user to configure the 
-system to his needs, e.g. by configuring snap, flatpak, flathub, etc.
+    system to his needs, e.g. by configuring snap, flatpak, flathub, etc.</p>
+    <img src="data/screenshot-1.png">
+</div>
 
 
 ## Build