chore(flake): added flakes

Author: codedsprit

flake.lock

@@ -0,0 +1,35 @@
+{
+  description = "pwnwriter's random notes";
+
+  inputs = {
+    nixpkgs.url = "github:nixos/nixpkgs/nixos-unstable";
+    flake-utils.url = "github:numtide/flake-utils";
+  };
+
+  outputs = { nixpkgs, flake-utils, ... }: 
+    flake-utils.lib.eachDefaultSystem (system:
+      let
+        pkgs = import nixpkgs { inherit system; };
+      in
+      {
+        devShells.default = pkgs.mkShell {
+          packages = [
+            pkgs.mdbook
+          ];
+        };
+
+        packages.mdbookBuild = pkgs.stdenv.mkDerivation {
+          name = "mdbook-build";
+          src = ./.;
+          buildInputs = [ pkgs.mdbook ];
+          buildPhase = ''
+            mdbook build
+          '';
+          installPhase = ''
+            mkdir -p $out
+            cp -r book/* $out/
+          '';
+        };
+      }
+    );
+}