jre: change compression ratio in favour of speed

Dockerfile.jre

@@ -8,12 +8,20 @@ FROM docker.io/rockdrilla/graalvm-debian:jdk-${JAVA_VERSION_MAJOR}-${IMAGE_VERSI
 FROM jdk as jdk-to-jre
 SHELL [ "/bin/sh", "-ec" ]
 
+ARG JAVA_VERSION_MAJOR
+## modern "jlink --compress" approach
+ENV JLINK_COMPRESS='zip-1'
+
 RUN rm -rf /jre ; \
+    if [ "${JAVA_VERSION_MAJOR}" = 17 ] ; then \
+        ## legacy "jlink --compress" approach
+        JLINK_COMPRESS='1' ; \
+    fi ; \
     jlink \
       --add-modules ALL-MODULE-PATH \
       --no-man-pages \
       --no-header-files \
-      --compress=1 \
+      --compress=${JLINK_COMPRESS} \
       --output /jre \
     ; \
     cd /jre ; \