reordering readme to prioritise prebuilt images

README.md

@@ -10,9 +10,28 @@ This repository contains scripts to intialise a Raspberry Pi with the Carpentrie
 ## You will need:
 * A Raspberry Pi with an internet connection
 * An installation of Raspberry Pi OS Lite
-* 2.5GB of more free on the SD card
+* 3GB of more free on the SD card
 
-## Setting up a Raspberry Pi with an operating system:
+## Using pre-built images
+There are pre-built images available from the releases section of this page. These are experimental and unlikely to be fully working yet. 
+These are built as multipart zip files with names like release.zip and release.z01, this is due to a 2GB upload limit in our build process. Download each of these. To extract them on a Linux system run the following:
+
+`cat release.z01 release.zip > carpentries-offline.zip`
+
+`unzip carpentries-offline.zip`
+
+After you have downloaded and unzipped the image files, write the image file to an SD card with [Etcher](https://www.balena.io/etcher/) or your image writing program of choice. 
+
+## Connect to Carpentries Offline
+* After installing the Raspberry Pi will reboot.
+* It will then switch the WiFi interface to access point mode and will be available as a network called carpentries-offline. 
+* Connect to the carpenpi WiFi network
+* Visting http://carpentriesoffline.org or http://192.168.1.1
+* You should get links to the Carpentries Lessons and the Gitea server on the Raspberry Pi
+
+## Building the image yourself:
+
+### Setting up a Raspberry Pi with an operating system:
 * Download Raspbian OS Lite: https://www.raspberrypi.org/software/operating-systems/
 * Write image to SD card using rpi-imager: https://www.raspberrypi.org/software/
 
@@ -33,29 +52,13 @@ network={
 }
 ```
 
-## Run the install script
+### Run the install script
 * Login to your Raspberry Pi with an SSH client or on a local screen/keyboard and run the command:
 * curl https://raw.githubusercontent.com/carpentriesoffline/carpentriesoffline-installer/main/setup.sh > setup.sh && bash ./setup.sh
 
-## Change the password
-* Run the passwd command. Leaving the default password will mean anybody in your workshop can login to your Pi and change settings on it.
+### Change the password
+* Run the passwd command. Leaving the default password will mean anybody in your workshop can login to your Pi and change settings on it
 
-## Connect to Carpentries Offline
-* After installing the Raspberry Pi will reboot.
-* It will then switch the WiFi interface to access point mode and will be available as a network called carpentries-offline. 
-* Connect to the carpenpi WiFi network
-* Visting http://carpentriesoffline.org or http://192.168.1.1
-* You should get links to the Carpentries Lessons and the Gitea server on the Raspberry Pi
-
-## Using pre-built images
-There are pre-built images available from the releases section of this page. These are experimental and unlikely to be fully working yet. 
-These are built as multipart zip files with names like release.zip and release.z01, this is due to a 2GB upload limit in our build process. Download each of these. To extract them on a Linux system run the following:
-
-`cat release.z01 release.zip > carpentries-offline.zip`
-
-`unzip carpentries-offline.zip`
-
-After you have downloaded and unzipped the image files, write the image file to an SD card with [Etcher](https://www.balena.io/etcher/) or your image writing program of choice. 
 
 # Development Status