Initial commit of pxeboot role

- iPXE menu that can be chainloaded
- Memtest and Ubuntu 18.04 targets
- preseed created on a per-serial basis

Change-Id: I6f231ad615025c50963110945a06378936ecf26f
diff --git a/handlers/main.yml b/handlers/main.yml
new file mode 100644
index 0000000..f31a3af
--- /dev/null
+++ b/handlers/main.yml
@@ -0,0 +1,5 @@
+---
+# pxeboot handlers/main.yml
+#
+# SPDX-FileCopyrightText: © 2020 Open Networking Foundation <support@opennetworking.org>
+# SPDX-License-Identifier: Apache-2.0