adding default.nix for better installation on linux systems having nix package manager

default.nix

@@ -0,0 +1,27 @@
+{ pkgs ? import <nixpkgs> {} }:
+
+let 
+acord = pkgs.rustPlatform.buildRustPackage rec {
+    pname = "acord";
+    version = "0.1.0";
+
+    src = ./.; # Or fetchFromGitHub
+
+# The hash of the cargo dependencies
+        cargoHash = "sha256-Tx5dHEnpbs2MmoGKRlXeRhZRWWbDaXYnwjX+oo37s8E=";
+    cargoBuildFlags = [ "-p" "acord-linux" ];
+# Required for consistency if your tests also need the -p flag
+    cargoCheckFlags = [ "-p" "acord-linux" ];
+
+
+
+# Optionally add native build inputs (e.g., pkg-config, cmake)
+    nativeBuildInputs = with pkgs; [ pkg-config ];
+    buildInputs = with pkgs; [ openssl ];
+};
+in 
+pkgs.writeShellScript "acord" ''
+exec ${pkgs.steam-run}/bin/steam-run ${acord}/bin/acord "$@"
+''
+
+