few changes to the docs

docs/setup-guide/manual-setup/operating-system.md

@@ -1,27 +1,35 @@
 ---
 layout: default
 title: Operating System
-parent: Manual Setup Guide
+parent: Manual Setup
 grand_parent: Setup Guides
 nav_order: 2
 permalink: /setup/manual-setup/operating-systen
+description: >-
+  Manual Setup: tips and recommendations for the OS.
 ---
-## Operation System
-> ⚠️ **Please don't use an OctoPi image!**  
-It can cause unforeseeable events, like rips in the space-time continuum. So be aware!
+
+# {{ page.title }}
+{{ page.description }}
+
+**Please don't use an OctoPi image!**  
+It can cause unforeseeable events, like rips in the space-time continuum. So be aware!  
+No seriously. Experiences have shown that it is advisable not to use an OctoPi image (especially for beginners).
+{: .warning }
 
 It is recommended to use a clean Raspberry Pi OS 32-bit Lite image (previously called Raspbian). You can download it [here](https://downloads.raspberrypi.org/raspios_lite_armhf_latest){:target="_blank"}.  
 For more information about installing Raspberry Pi OS click [here](https://www.raspberrypi.org/documentation/installation/installing-images/){:target="_blank"}. Don't forget to enable ssh.
 
 Once you have finished the installation and are connected via ssh, you can continue.
 
-### Requirements
+## Requirements
 ```bash
 sudo apt update && sudo apt upgrade
 sudo apt install git dfu-util unzip
 ```
 
-> ⚠️ **Moonraker requires Python 3.7 or greater,** verify that your distribution's Python 3 packages meet this requirement.
+**Moonraker requires Python 3.7 or greater,** verify that your distribution's Python 3 packages meet this requirement.  
+{: .alert }
 
 ```
 python3 --version