[raspberry] add base image

i currently try building it and then check if it works

machines/configuration.nix

@@ -36,4 +36,21 @@ in
       ./moderatio/configuration.nix
     ];
   };
+
+  rpi1_base_image = nixosSystem {
+    system = "aarch64-linux";
+    modules = [
+      "${nixpkgs}/nixos/modules/installer/sd-card/sd-image-raspberrypi.nix"
+      ./modules/sshd.nix
+      {
+        nixpkgs.config.allowUnsupportedSystem = true;
+        nixpkgs.crossSystem.system = "aarch64-linux";
+
+        networking.hostName = "rp1_base_image";
+        networking.networkmanager.enable = true;
+
+        system.stateVersion = "22.05";
+      }
+    ];
+  };
 }