Add dummy app

bsc/apps/dummy/default.nix

@@ -0,0 +1,18 @@
+{
+  stdenv
+, branch ? null
+, srcPath ? null
+}:
+
+#assert if srcPath == null then branch != null else true;
+
+stdenv.mkDerivation rec {
+  name = "dummy";
+
+  src = (if srcPath != null then srcPath else
+    builtins.fetchGit {
+      url = "ssh://git@bscpm02.bsc.es/rarias/dummy.git";
+      ref = "${branch}";
+    }
+  );
+}