all: add and convert the license and copyright headers to SPDX formats

We use spdxconv [1] tool to help converting the license and copyright.

[1]: https://kilabit.info/project/spdxconv/

1 files changed, 3 insertions, 0 deletions

diff --git a/_umum.aww b/_umum.aww
index 278e5f6..4343e80 100644
--- a/_umum.aww
+++ b/_umum.aww
@@ -1,3 +1,6 @@
+# SPDX-License-Identifier: CC-BY-SA-4.0
+# SPDX-FileCopyrightText: 2024 M. Shulhan <ms@kilabit.info>
+
 #require: gcloud config configurations activate {{.Val "gcloud:project:config"}}
 
 gcloud storage cp --recursive \