Update license references

Patch set 2: Places License.txt
Patch set 3: Additional licensing
Patch set 4: Review licensing.

Issue-ID: NONRTRIC-779
Change-Id: Idc29fe0a6ff81e02434e3de0faae4b22a054ec89
Signed-off-by: halil.cakal <halil.cakal@est.tech>
diff --git a/.readthedocs.yaml b/.readthedocs.yaml
index 8df5ada..7f0136e 100644
--- a/.readthedocs.yaml
+++ b/.readthedocs.yaml
@@ -1,3 +1,20 @@
+#  ============LICENSE_START===============================================
+#  Copyright (C) 2020-2022 Nordix Foundation. All rights reserved.
+#  ========================================================================
+#  Licensed under the Apache License, Version 2.0 (the "License");
+#  you may not use this file except in compliance with the License.
+#  You may obtain a copy of the License at
+#
+#       http://www.apache.org/licenses/LICENSE-2.0
+#
+#  Unless required by applicable law or agreed to in writing, software
+#  distributed under the License is distributed on an "AS IS" BASIS,
+#  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+#  See the License for the specific language governing permissions and
+#  limitations under the License.
+#  ============LICENSE_END=================================================
+#
+
 ---
 version: 2
 
@@ -13,4 +30,4 @@
     - requirements: docs/requirements-docs.txt
 
 sphinx:
-  configuration: docs/conf.py
\ No newline at end of file
+  configuration: docs/conf.py