fix(iso): Update invocation command (#1)

README.md

@@ -13,9 +13,10 @@ The script expects minimal prep on your end. Please make sure that before execut
 - Boot an Arch Linux live CD ISO image
 - Run:
     ```
-    curl -s https://quico.space/hygienic-books/config-jetbrains-ides/raw/branch/master/colors.scheme.xml | bash
+    export SCRIPT_URL='https://quico.space/quico-os-setup/arch-zbm/raw/branch/main/setup.sh'
+    curl -s "${SCRIPT_URL}" | bash
     ```
-
+    The script will call itself when it changes into its `chroot`, that's why we `export SCRIPT_URL`. Feel free to update `"${SCRIPT_URL}"` with whatever branch or revision you want to use from [quico.space/quico-os-setup/arch-zbm](https://quico.space/quico-os-setup/arch-zbm). Typically `.../branch/main/setup.sh` as shown above is what you want.
 # Steps
 
 The scripts takes the following installation steps.

setup.sh

@@ -1,7 +1,9 @@
 #!/bin/bash
 
-declare this_script_remote_repo_raw_url zpool_name zfs_arch_dataset_name
-this_script_remote_repo_raw_url='https://quico.space/...'
+declare this_script_url
+this_script_url="${SCRIPT_URL:?}"
+
+declare zpool_name zfs_arch_dataset_name
 zpool_name='zpool'
 zfs_arch_dataset_name='archlinux'