Add deployment instructions to README

README.md

@@ -7,3 +7,11 @@ Currently managed systems:
     - Default running GNOME
     - Specialisation running Cosmic
 - **gamepc**: My gaming PC running Cinnamon
+
+## Deployment
+
+**sue**: `colmena apply-local --sudo --impure`
+**gamepc**: `colmena apply --on gamepc --impure`
+
+> [!NOTE]
+> Currently the `--impure` is necessary until I upgrade to NixOS 23.11. See [this PR](https://github.com/zhaofengli/colmena/pull/228).