Adding copyright and update the maintainer

Dockerfile

@@ -1,6 +1,20 @@
+#  Copyright (C) 2018-2021 LEIDOS.
+#
+#  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.
+
 FROM ubuntu:18.04
 
-MAINTAINER ODU Team
+MAINTAINER Leidos, Inc.
 LABEL Description="Dockerised Simulation of Carla_Sumo_Mosaic"
 
 ENV SUMO_HOME /usr/share/sumo