使用 docker 的 multi stage build Java 镜像, 太慢了, 怎么破?

docker file 如下

FROM maven:3-openjdk-8 AS build

ENV PROJECT_HOME="/projects"

RUN mkdir $PROJECT_HOME
COPY . $PROJECT_HOME
WORKDIR $PROJECT_HOME
RUN mvn clean package

FROM openjdk:8-jre-alpine AS package

ENV APP_HOME="/app"
ENV JAR_NAME="demo-1.0-SNAPSHOT.jar"

RUN mkdir $APP_HOME
COPY --from=build /projects/target/$JAR_NAME $APP_HOME
WORKDIR $PROJECT_HOME

CMD java -jar $APP_JAR_NAME

现在问题是, 每次 build image 时, mvn clean package 无法使用本机.m2 中的缓存, 都要重新下载一遍依赖, 怎么破?