add back license notice

Author: xgnl

ubuntu/standard/4.0/Dockerfile

@@ -1,3 +1,14 @@
+# Copyright 2020-2020 Amazon.com, Inc. or its affiliates. All Rights Reserved.
+#
+# Licensed under the Amazon Software License (the "License"). You may not use this file except in compliance with the License.
+# A copy of the License is located at
+#
+#    http://aws.amazon.com/asl/
+#
+# or in the "license" file accompanying this file.
+# This file is distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, express or implied.
+# See the License for the specific language governing permissions and limitations under the License.
+
 FROM ubuntu:18.04 AS core
 
 ENV DEBIAN_FRONTEND="noninteractive"

ubuntu/standard/5.0/Dockerfile

@@ -1,3 +1,14 @@
+# Copyright 2020-2020 Amazon.com, Inc. or its affiliates. All Rights Reserved.
+#
+# Licensed under the Amazon Software License (the "License"). You may not use this file except in compliance with the License.
+# A copy of the License is located at
+#
+#    http://aws.amazon.com/asl/
+#
+# or in the "license" file accompanying this file.
+# This file is distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, express or implied.
+# See the License for the specific language governing permissions and limitations under the License.
+
 FROM ubuntu:20.04 AS core
 
 ARG DEBIAN_FRONTEND="noninteractive"