add ant Dockerfile, use jdk major version numbers instead

docker/ant/Dockerfile

@@ -0,0 +1,33 @@
+FROM ubuntu:16.04 as downloader
+
+ARG jdk=9
+ADD provision/jdk/java-${jdk}.sh provision/jdk/java-${jdk}.sh
+RUN provision/jdk/java-${jdk}.sh
+
+ARG ant=1.10.1
+ADD provision/ant/ant-${ant}.sh provision/ant/ant-${ant}.sh
+RUN provision/ant/ant-${ant}.sh
+
+FROM ubuntu:16.04
+
+COPY --from=downloader /usr/local/apache-ant/ /usr/local/apache-ant/
+COPY --from=downloader /opt/jdk/ /opt/jdk/
+
+RUN update-alternatives  --install /usr/bin/java java /opt/jdk/bin/java 1000 && update-alternatives  --install /usr/bin/javac javac /opt/jdk/bin/javac 1000 && update-alternatives  --install /usr/bin/javadoc javadoc /opt/jdk/bin/javadoc 1000 && update-alternatives  --install /usr/bin/javap javap /opt/jdk/bin/javap 1000
+
+WORKDIR workspace
+
+ADD shared/ ./
+
+ARG jdk=9
+ADD ant/files/jdk-${jdk} ./
+
+ARG lombokjar=lombok.jar
+ADD https://projectlombok.org/downloads/${lombokjar} lombok.jar
+
+ENV JDK_VERSION=${jdk}
+ENV JAVA_HOME=/opt/jdk
+ENV ANT_HOME=/usr/local/apache-ant/apache-ant
+ENV PATH="${JAVA_HOME}/bin:${ANT_HOME}/bin:${PATH}"
+
+ENTRYPOINT bash