I'm not sure this is the issue you are referencing, but you can use multi-stage Docker image builds to avoid bundling the JDK in the final Docker image:

  FROM openjdk:jdk AS build
  
  COPY . .
  RUN mvn package

  FROM openjdk:jre

  COPY --from=build ./somepath/app.jar .

  CMD java app.jar

The first stage (defined by the first FROM) is only used to build the ".jar", the second stage will only contain the JRE and the ".jar" copied from the first stage.