Added Release Dockerfile pipeline

Author: rawlingsj

Diff for: Dockerfile.release

@@ -0,0 +1,7 @@
+
+FROM openjdk:8-jdk-alpine
+ENV PORT 8080
+EXPOSE 8080
+COPY target/*.jar /opt/app.jar
+WORKDIR /opt
+CMD ["java", "-jar", "app.jar"]