fix: dedicated bootstrap config

hosts/bootstrap.nix

@@ -0,0 +1,18 @@
+{ profiles, ... }:
+{
+  # build with: `bud build bootstrap bootstrapIso`
+  # reachable on the local link via ssh root@fe80::47%eno1
+  # where 'eno1' is replaced by your own machine's network
+  # interface that has the local link to the target machine
+  imports = [
+    # profiles.networking
+    profiles.core
+    profiles.users.root # make sure to configure ssh keys
+    profiles.users.nixos
+  ];
+
+  boot.loader.systemd-boot.enable = true;
+
+  # will be overridden by the bootstrapIso instrumentation
+  fileSystems."/" = { device = "/dev/disk/by-label/nixos"; };
+}