webui: tests for machine config endpoints

pkgs/clan-cli/tests/machine_flake/flake.nix

@@ -0,0 +1,10 @@
+{
+  inputs = {
+    # this placeholder is replaced by the path to nixpkgs
+    nixpkgs.url = "__CLAN_NIXPKGS__";
+  };
+
+  outputs = _inputs: {
+    clanModules.machine-machine1 = ./clanModules/machine1.nix;
+  };
+}