Fix some small updates

flake.nix

@@ -0,0 +1,25 @@
+{
+  description = "styrdokument flake";
+
+  inputs = {
+    nixpkgs.url = "github:nixos/nixpkgs/nixos-unstable";
+    systems.url = "github:nix-systems/x86_64-linux";
+
+    flake-parts.url = "github:hercules-ci/flake-parts";
+    flake-parts.inputs.nixpkgs-lib.follows = "nixpkgs";
+  };
+
+  outputs = inputs:
+    let mkFlake = inputs.flake-parts.lib.mkFlake { inherit inputs; };
+    in mkFlake ({ inputs, ... }: {
+      systems = import inputs.systems;
+      perSystem = { self, inputs, lib, pkgs, ... }:
+        {
+          devShells.default = pkgs.mkShell {
+            buildInputs = with pkgs; [
+              hugo
+            ];
+          };
+        };
+    });
+}