Update Dockerfile

Dockerfile

@@ -16,6 +16,22 @@ RUN apt-get update && \
     apt-get clean && \
     rm -rf /var/lib/apt/lists/*
 
+# Install JAVA OpenJDK-8
+RUN apt-get update && \
+    apt-get install -y openjdk-8-jdk && \
+    apt-get install -y ant && \
+    apt-get clean;
+    
+# Fix certificate issues JAVA OpenJDK-8
+RUN apt-get update && \
+    apt-get install ca-certificates-java && \
+    apt-get clean && \
+    update-ca-certificates -f;
+
+# Setup JAVA_HOME -- useful for docker commandline
+ENV JAVA_HOME /usr/lib/jvm/java-8-openjdk-amd64/
+RUN export JAVA_HOME
+
 # Setup default prompt
 RUN echo 'export PS1=`echo $JUPYTERHUB_USER| sed s/-at-.*//`"@jupyterhub:\w\$ "' > /etc/profile.d/02-prompt.sh
 # Hack to override the setting of PS1 in the users's bashrc