Dockerfile

# Dockerizing a base images with:
#
#   - Ubuntu 22.04 LTS (Jammy Jellyfish)
#   - OpenJDK 21
#
# Build:    docker build -t exoplatform/jdk:openjdk-21 .
#
# Run:      docker run -ti exoplatform/jdk:openjdk-21 -version

FROM  exoplatform/ubuntu:22.04
LABEL maintainer="eXo Platform <docker@exoplatform.com>"

ENV JDK_MAJOR_VERSION 21

# Install OpenJDK Java 21 SDK
RUN apt-get -qq update && \
    apt-get -qq -y install gnupg ca-certificates curl
RUN curl -s https://repos.azul.com/azul-repo.key | gpg --dearmor -o /usr/share/keyrings/azul.gpg
RUN echo "deb [signed-by=/usr/share/keyrings/azul.gpg] https://repos.azul.com/zulu/deb stable main" | tee /etc/apt/sources.list.d/zulu.list
RUN apt-get -qq update && \
    apt-get -qq -y install zulu${JDK_MAJOR_VERSION}-jdk
RUN apt-get -qq -y autoremove && \
    apt-get -qq -y clean && \
    rm -rf /var/lib/apt/lists/*
ENV JAVA_HOME /usr/lib/jvm/zulu${JDK_MAJOR_VERSION}-ca-amd64

ENTRYPOINT ["/usr/local/bin/tini", "--", "/usr/bin/java"]