Initialize nixos server config

flake.nix

@@ -0,0 +1,56 @@
+{
+  description = "NixOS configuration";
+
+  inputs.nixpkgs.url = "github:nixos/nixpkgs/nixos-unstable";
+
+  outputs =
+    inputs@{ nixpkgs, home-manager, ... }:
+    let
+      systems = [
+        "x86_64-linux"
+        "aarch64-linux"
+      ];
+
+      forAllSystems =
+        f:
+        builtins.listToAttrs (
+          map (system: {
+            name = system;
+            value = f system;
+          }) systems
+        );
+    in
+    {
+      devShells = forAllSystems (
+        system:
+        let
+          pkgs = nixpkgs.legacyPackages.${system};
+        in
+        {
+          default = pkgs.mkShell {
+            packages = with pkgs; [
+              nixd
+              nixfmt
+            ];
+          };
+        }
+      );
+
+      nixosConfigurations =
+        let
+          mkSystem =
+            entrypoint:
+            nixpkgs.lib.nixosSystem {
+              system = "x86_64-linux";
+              specialArgs = { inherit inputs; };
+              modules = [
+                entrypoint
+                { nix.registry.nixpkgs.flake = nixpkgs; }
+              ];
+            };
+        in
+        {
+          server = mkSystem ./server;
+        };
+    };
+}