Dockerfile

FROM azul/zulu-openjdk-alpine:11 as packager

ENV PATH $JAVA_HOME/bin:$PATH

RUN { \
        java --version ; \
        echo "jlink version:" && \
        jlink --version ; \
    }

ENV JAVA_MINIMAL=/opt/jre

# build modules distribution
RUN jlink \
    --verbose \
    --add-modules \
        java.base,java.sql,java.naming,java.desktop,java.management,java.security.jgss,java.instrument,jdk.unsupported,java.rmi,jdk.crypto.ec \
        # java.naming - javax/naming/NamingException
        # java.desktop - java/beans/PropertyEditorSupport
        # java.management - javax/management/MBeanServer
        # java.security.jgss - org/ietf/jgss/GSSException
        # java.instrument - java/lang/instrument/IllegalClassFormatException
        # jdk.unsupported - Spring AOP support
        # java.rmi - java/rmi/Remote - Spring Autowire
        # jdk.crypto.ec - SSL handshake
    --compress 2 \
    --strip-debug \
    --no-header-files \
    --no-man-pages \
    --output "$JAVA_MINIMAL"

# Second stage, add only our minimal "JRE" distr and our app
FROM alpine

ENV JAVA_MINIMAL=/opt/jre
ENV PATH="$PATH:$JAVA_MINIMAL/bin"

COPY --from=packager "$JAVA_MINIMAL" "$JAVA_MINIMAL"
VOLUME /tmp
COPY build/libs/*.jar app.jar

ENTRYPOINT ["sh", "-c", "java ${JAVA_OPTS} -jar /app.jar"]