Update Dockerfile

Dockerfile

@@ -15,13 +15,22 @@ ENV VERSION=${version} \
     IMAGE=shibboleth_idp_ui \
     MAINTAINER=InCommon
 
-COPY containerfiles/RPM-GPG-KEY-azulsystems .
 
-RUN rpm --import RPM-GPG-KEY-azulsystems
-RUN curl -o /etc/yum.repos.d/zulu.repo http://repos.azulsystems.com/rhel/zulu.repo
+# Install Corretto Java JDK
+#Corretto download page: https://docs.aws.amazon.com/corretto/latest/corretto-11-ug/downloads-list.html
+ARG CORRETTO_URL_PERM=https://corretto.aws/downloads/latest/amazon-corretto-11-x64-linux-jdk.rpm
+ARG CORRETTO_RPM=amazon-corretto-11-x64-linux-jdk.rpm
+COPY container_files/java-corretto/corretto-signg-key.pub .
+RUN curl -O -L $CORRETTO_URL_PERM \
+    && rpm --import corretto-signing-key.pub \
+    && rpm -K $CORRETTO_RPM \
+    && rpm -i $CORRETTO_RPM \
+    && rm -r corretto-signing-key.pub $CORRETTO_RPM
+ENV JAVA_HOME=/usr/lib/jvm/java-11-amazon-corretto
+
 RUN yum -q -qy update \
     && yum -qy install --setopt=tsflags=nodocs epel-release \
-    && yum -qy install zulu-8 curl cronie supervisor \
+    && yum -qy install curl cronie supervisor \
     && yum clean all \
     && rm -rf /var/cache/yum