the start of a Dockerfile for a sapsailing Docker image

docker/.gitignore

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+Dockerfile
+*.tar.gz

docker/Dockerfile.tpl

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+FROM openjdk:11
+LABEL maintainer=axel.uhl@sap.com
+# Download and extract the release
+WORKDIR /home/sailing/servers/server
+RUN apt-get update \
+ && apt-get install -y wget \
+ && wget -O /tmp/RELEASE.tar.gz http://releases.sapsailing.com/RELEASE/RELEASE.tar.gz \
+ && tar xzvpf /tmp/RELEASE.tar.gz \
+ && rm /tmp/RELEASE.tar.gz
+EXPOSE 8888

docker/makeImageForLatestRelease

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+#!/bin/bash
+release=$1
+if [ "$release" = "" ]; then
+  INDEX=`mktemp index_XXXX.html`
+  echo Tempfile for index.html is $INDEX
+  wget -O $INDEX http://releases.sapsailing.com/
+  release=$(cat $INDEX | grep build- | tail -1 | sed -e 's/^.*\(build-[0-9]*\).*$/\1/')
+  rm $INDEX
+  echo Latest release is $release
+fi
+cat Dockerfile.tpl | sed -e "s/RELEASE/${release}/g" >Dockerfile
+docker build -t sapsailing:$release .