Add LICENSE file

Change-Id: Ie614dcd034c8bb7d2e7dea20e8fe95bd5bfcf0cb
diff --git a/requirements.txt b/requirements.txt
index 06b8f1c..559baee 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -1,3 +1,8 @@
+#
+# SPDX-FileCopyrightText: 2022-present Intel Corporation
+# SPDX-FileCopyrightText: 2020-present Open Networking Foundation <info@opennetworking.org>
+# SPDX-License-Identifier: Apache-2.0
+#
 aniso8601==9.0.1
 certifi==2021.10.8
 charset-normalizer==2.0.11