download java through docker's ADD command

Author: N. Justus

Dockerfile

@@ -1,9 +1,10 @@
 
 FROM openmodelica/openmodelica:v1.12.0
 
-RUN wget https://download.java.net/java/GA/jdk11/9/GPL/openjdk-11.0.2_linux-x64_bin.tar.gz -O /tmp/openjdk.tar.gz
-RUN tar xfvz /tmp/openjdk.tar.gz --directory /opt &&\
-  /opt/jdk-11.0.2/bin/java -version
+ADD https://download.java.net/java/GA/jdk12.0.2/e482c34c86bd4bf8b56c0b35558996b9/10/GPL/openjdk-12.0.2_linux-x64_bin.tar.gz /tmp
+RUN tar xzf /tmp/openjdk-12.0.2_linux-x64_bin.tar.gz --directory /opt &&\
+  /opt/jdk-12.0.2/bin/java -version &&\
+  ln -s /opt/jdk-12.0.2/bin/java /usr/bin/java
 
 RUN useradd -ms /bin/bash openmodelica
 RUN mkdir -p /home/openmodelica/data &&\
@@ -17,4 +18,4 @@ RUN mv /opt/mope-server-*.jar /opt/mope-server.jar &&\
 USER openmodelica
 
 EXPOSE 3000
-CMD /opt/jdk-11.0.2/bin/java -jar /opt/mope-server.jar --interface='0.0.0.0' --port=3000
+CMD /usr/bin/java -jar /opt/mope-server.jar --interface='0.0.0.0' --port=3000