update README

nix/os/devices/sj-bm-hostkey0/flake.nix

@@ -0,0 +1,73 @@
+{
+  inputs = {
+    nixpkgs.url = "github:nixos/nixpkgs/nixos-unstable";
+
+    get-flake.url = "github:ursi/get-flake";
+
+    home-manager.url = "github:nix-community/home-manager/master";
+    home-manager.inputs.nixpkgs.follows = "nixpkgs";
+
+    disko.url = "github:nix-community/disko";
+    disko.inputs.nixpkgs.follows = "nixpkgs";
+    srvos.url = "github:numtide/srvos";
+    srvos.inputs.nixpkgs.follows = "nixpkgs";
+  };
+
+  # outputs = _: {};
+
+  outputs = {
+    self,
+    get-flake,
+    nixpkgs,
+    ...
+  } @ attrs: let
+    system = "x86_64-linux";
+    nodeName = "sj-bm-hostkey0";
+
+    mkNixosConfiguration = {extraModules ? [], ...} @ attrs:
+      nixpkgs.lib.nixosSystem (
+        nixpkgs.lib.attrsets.recursiveUpdate
+        attrs
+        {
+          specialArgs = {
+            nodeFlake = self;
+            repoFlake = get-flake ../../../..;
+            inherit nodeName;
+          };
+
+          modules =
+            [
+              ./configuration.nix
+
+              # flake registry
+              {
+                nix.registry.nixpkgs.flake = nixpkgs;
+              }
+
+              {
+                nixpkgs.overlays = [
+                  (final: previous: {
+                  })
+                ];
+              }
+            ]
+            ++ extraModules;
+        }
+      );
+  in {
+    nixosConfigurations = {
+      native = mkNixosConfiguration {
+        inherit system;
+      };
+
+      # cross = mkNixosConfiguration {
+      #   extraModules = [
+      #     {
+      #       nixpkgs.buildPlatform.system = "x86_64-linux";
+      #       nixpkgs.hostPlatform.system = system;
+      #     }
+      #   ];
+      # };
+    };
+  };
+}