🔨 add nix flake

flake.nix

@@ -0,0 +1,32 @@
+{
+  description = "A very basic flake";
+
+  inputs = {
+    nixpkgs.url = "github:nixos/nixpkgs/nixos-23.05";
+    flake-utils.url = "github:numtide/flake-utils";
+  };
+
+  outputs = { self, nixpkgs, flake-utils, ... }:
+    {
+      overlays.default = final: prev: {
+        inherit (self.packages.${prev.system}) workon;
+      };
+    } // flake-utils.lib.eachDefaultSystem (system:
+      let pkgs = nixpkgs.legacyPackages.${system};
+      in
+      {
+        packages.gotem = pkgs.buildGoModule {
+          pname = "gotem";
+          version = "0.1.0";
+          src = ./.;
+          vendorHash = "sha256-eKeUhS2puz6ALb+cQKl7+DGvm9Cl+miZAHX0imf9wdg=";
+        };
+        packages.default = self.packages.${system}.gotem;
+
+        devShells.default = pkgs.mkShell {
+          name = "gotem";
+          buildInputs = with pkgs; [ go gopls ];
+        };
+      }
+    );
+}