Containerize GCP proxy

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Created by MOE: https://github.com/google/moe
MOE_MIGRATED_REVID=186002010

java/google/registry/proxy/Dockerfile

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+# Copyright 2018 The Nomulus Authors. 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.
+
+FROM openjdk:8
+
+WORKDIR /proxy
+
+COPY ./proxy_server_deploy.jar /proxy/
+
+ENTRYPOINT ["java", "-jar", "proxy_server_deploy.jar"]
+
+# Ports used for health checking, EPP and WHOIS, respecitvely.
+EXPOSE 11111 22222 12345