[nix] change .#docs to just start browser and use .#docsDev for local development

outputs.nix

@@ -206,6 +206,15 @@ in (utils.lib.eachSystem (builtins.filter filter_system utils.lib.defaultSystems
       docs = {
         type = "app";
         program = builtins.toString (pkgs.writeShellScript "docs" ''
+          ${pkgs.xdg-utils}/bin/xdg-open "${self.packages.${system}.docs}/share/doc/index.html"
+        '');
+      };
+
+
+      docsDev = {
+        type = "app";
+        program = builtins.toString (pkgs.writeShellScript "docs" ''
+          echo "needs to run from infrastuctre root folder"
           ${pkgs.mdbook}/bin/mdbook serve --open ./doc
         '');
       };