Add impermanence create option

Signed-off-by: Nikolaos Karaolidis <nick@karaolidis.com>

hosts/installer/README.md

@@ -4,15 +4,9 @@ I have automated myself out of a job. How to use:
 
 1. Boot into installer
 
-2. Unlock luks partition
+2. Connect to the internet with `sudo nmcli device wifi connect "<SSID>" [--ask]`
 
-3. Connect to the internet with `nmcli`
-
-  ```bash
-  sudo nmcli device wifi connect "<SSID>" [--ask]
-  ```
-
-4. Run `sudo nix-install /etc/nixos -m install|repair -h host [-k key] [-c] [-r]"`
+3. Run `sudo nix-install /etc/nixos -m install|repair -h host [-k key] [-c] [-r]"`
 
 ## Reinstalling the Installer