Merge pull request #5341 from JohnNiang/chore/upgrade-to-openj9-21

Upgrade Halo runtime environment to JRE 21

Author: JohnNiang

Dockerfile

@@ -1,4 +1,4 @@
-FROM eclipse-temurin:17-jre as builder
+FROM eclipse-temurin:21-jre as builder
 
 WORKDIR application
 ARG JAR_FILE=application/build/libs/*.jar
@@ -7,7 +7,7 @@ RUN java -Djarmode=layertools -jar application.jar extract
 
 ################################
 
-FROM ibm-semeru-runtimes:open-17-jre
+FROM ibm-semeru-runtimes:open-21-jre
 MAINTAINER johnniang <johnniang@fastmail.com>
 WORKDIR application
 COPY --from=builder application/dependencies/ ./