Add flake and zine

flake.nix

@@ -0,0 +1,51 @@
+{
+  description = "yadunut.dev website";
+  inputs = {
+    nixpkgs.url = "github:NixOS/nixpkgs/nixpkgs-unstable";
+    flake-utils = {
+      url = "github:numtide/flake-utils";
+    };
+  };
+
+  outputs =
+    {
+      nixpkgs,
+      flake-utils,
+      ...
+    }:
+    flake-utils.lib.eachDefaultSystem (
+      system:
+      let
+        pkgs = import nixpkgs {
+          inherit system;
+        };
+        zineBinary =
+          if system == "aarch64-darwin" then
+            pkgs.stdenvNoCC.mkDerivation {
+              pname = "zine";
+              version = "0.11.1";
+              src = pkgs.fetchzip {
+                url = "https://github.com/kristoff-it/zine/releases/download/v0.11.1/aarch64-macos.zip";
+                sha256 = "WKY9B4ObE4D7fkvMsF3cLvGHyxOT2FI8YNwLmOAujrQ=";
+                stripRoot = false;
+              };
+              installPhase = ''
+                mkdir -p $out/bin
+                cp $src/zine $out/bin/
+                chmod +x $out/bin/zine
+              '';
+            }
+          else
+            { };
+      in
+      {
+        devShells = {
+          default = pkgs.mkShell {
+            buildInputs = [
+              zineBinary
+            ];
+          };
+        };
+      }
+    );
+}