Switch to building a deb file, for convenience.

Dockerfile

-FROM library/java
+FROM re6exp/debian-jessie-oracle-jdk-8
 MAINTAINER jorn.dejong@uninett.no
 ARG VERSION=master
+RUN apt-get update
+RUN apt-get install -y --force-yes git fakeroot dpkg-sig lintian
 RUN git clone -b ${VERSION} --single-branch --depth 1 https://github.com/yahoo/kafka-manager.git
 WORKDIR /kafka-manager
 RUN echo 'scalacOptions ++= Seq("-Xmax-classfile-name", "200")' >> build.sbt && \
-./sbt clean dist
-WORKDIR /kafka-manager/target/universal
-CMD tar c kafka-manager-*.zip
+./sbt debian:packageBin
+WORKDIR /kafka-manager/target
+CMD tar c kafka-manager_*.deb