added nix run functionality

flake.nix

@@ -15,14 +15,15 @@
     rust-overlay,
   }: let
     # rust-overlay = import rust-overlay;
+      system = "x86_64-linux";
     pkgs =
       import nixpkgs
       {
-        system = "x86_64-linux";
+        inherit system;
         overlays = [rust-overlay.overlays.default];
       };
   in {
-    devShells.x86_64-linux.default = pkgs.mkShell {
+    devShells.${system}.default = pkgs.mkShell {
       buildInputs = with pkgs; [
         rust-bin.nightly.latest.default
         rust-analyzer
@@ -32,6 +33,37 @@
       #   echo "Hello from nix dev shell"
       # '';
     };
-    formatter.x86_64-linux = pkgs.alejandra;
+    formatter.${system} = pkgs.alejandra;
+    packages.${system}.default = pkgs.stdenv.mkDerivation rec {
+      pname = "webbisitey-${version}";
+      version = "0.1.0";
+
+      src = ./src/..;
+      runtime = ./public;
+
+      nativeBuildInputs = [
+        pkgs.makeWrapper
+        pkgs.rust-bin.nightly.latest.default
+      ];
+
+      buildPhase = ''
+        runHook preBuild
+        cargo build -r
+        mkdir -p $out/bin
+        cp target/release/webbisitey $out/bin
+        runHook postBuild
+      '';
+
+      installPhase = ''
+        makeWrapper  $out/bin/webbisitey $out/bin/webbisitey-wrapped --run 'cd $(dirname $0)';
+        cp -r $runtime $out/bin/public
+      '';
+      
+      meta = {
+        description = "Website server backend";
+        license = pkgs.lib.licenses.mit;
+        mainProgram = "webbisitey-wrapped";
+      };
+    };
   };
 }