small adaptations, add zen

README.md

@@ -16,7 +16,27 @@ Don't forget to add the `#<host>` to the end of the target to specify the host c
 ## Hosts
 
 ### Spectre
-Run `nixos-rebuild switch --flake <target>#spectre` to apply the configuration.
+
+
+
+
+## Usage
+### Deploying to a machine
+Run 
+```bash
+nixos-rebuild switch --flake <target>#<machine>
+# for instance
+nixos-rebuild switch --flake .#spectre
+```
+to apply the configuration.
+
+### Installer iso
+To build an installer iso, run
+```bash
+nix build .#nixosConfigurations.bcachefs-iso.config.system.build.isoImage
+```
+This will create an iso image in the result directory.
+
 
 
 ## Inspirations