Adding Apache License v2.0 to Dockerfiles (#39)

LICENSE

@@ -0,0 +1,13 @@
+Copyright (c) 2016-present Sonatype, Inc.
+
+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.

oss/Dockerfile

@@ -1,5 +1,22 @@
+# Copyright (c) 2014-present Sonatype, Inc.
+#
+# 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       centos:centos7
 MAINTAINER Sonatype <cloud-ops@sonatype.com>
+LABEL vendor=Sonatype \
+  com.sonatype.license="Apache License, Version 2.0" \
+  com.sonatype.name="Nexus Repository Manager OSS base image"
 
 ENV SONATYPE_WORK /sonatype-work
 ENV NEXUS_VERSION 2.14.0-01

pro/Dockerfile

@@ -1,5 +1,22 @@
+# Copyright (c) 2014-present Sonatype, Inc.
+#
+# 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       centos:centos7
 MAINTAINER Sonatype <cloud-ops@sonatype.com>
+LABEL vendor=Sonatype \
+  com.sonatype.license="Apache License, Version 2.0" \
+  com.sonatype.name="Nexus Repository Manager Pro base image"
 
 ENV SONATYPE_WORK /sonatype-work
 ENV NEXUS_VERSION 2.14.0-01