add nix flake to build the package

.gitignore

@@ -1,2 +1,4 @@
-/target
 .idea
+
+result
+/target

flake.nix

@@ -0,0 +1,45 @@
+{
+  description = "Description for the project";
+
+  inputs = {
+    flake-parts.url = "github:hercules-ci/flake-parts";
+    nixpkgs.url = "github:NixOS/nixpkgs/nixos-unstable";
+    rust-overlay.url = "github:oxalica/rust-overlay";
+  };
+
+  outputs = inputs@{ flake-parts, ... }:
+    flake-parts.lib.mkFlake { inherit inputs; } {
+      imports = [
+        # To import a flake module
+        # 1. Add foo to inputs
+        # 2. Add foo as a parameter to the outputs function
+        # 3. Add here: foo.flakeModule
+
+      ];
+      systems = [ "x86_64-linux" "aarch64-linux" "aarch64-darwin" ];
+      perSystem = { config, self', inputs', pkgs, system, ... }: {
+        packages.default = pkgs.rustPlatform.buildRustPackage rec {
+          pname = "wg-mesh";
+          version = "0.1.0";
+
+          src = ./.;
+          cargoLock = {
+            lockFile = ./Cargo.lock;
+          };
+
+          # rsdns runs rustfmt on build, so provide the binary
+          nativeBuildInputs = with pkgs; [
+            rustPlatform.bindgenHook
+            rustfmt
+          ];
+
+        };
+      };
+      flake = {
+        # The usual flake attributes can be defined here, including system-
+        # agnostic ones like nixosModule and system-enumerating ones, although
+        # those are more easily expressed in perSystem.
+
+      };
+    };
+}