How to copy dockerFileDir config file to maven dir?

I need to copy file kafka.client.truststore.jks 、kafka_client_jaas.conf totarget/docker/fengxin58/demo-fabric8/0.0.1-SNAPSHOT/build/maven, after building the project using the default configuration,but only app.jar is found after building operation under target dir maven

pom.xml

<!-- docker plugin -->
<plugin>
    <groupId>io.fabric8</groupId>
    <artifactId>docker-maven-plugin</artifactId>
    <version>0.24.0</version>
    <configuration>
        <images>
            <image>
                <!--
                A sanitized version of the artefact id so that
                it can be used as part of an Docker image name.
                I.e. it is converted to all lower case (as required by Docker)
                %a 構(gòu)件id
                -->
                <name>fengxin58/%a:%v</name>
                <registry>registry.cn-hangzhou.aliyuncs.com</registry>
                <build>
                    <!--<filter>true</filter>-->
                    <dockerFileDir>${basedir}/src/main/docker</dockerFileDir>
                    <assembly>
                        <descriptorRef>artifact</descriptorRef>
                        <!--jar的輸出目錄, 默認(rèn)值為maven-->
                        <!--<name>maven</name>-->
                        <!--default value is dir-->
                        <mode>dir</mode>
                    </assembly>
                    <tags>
                        <tag>${project.version}</tag>
                    </tags>

                </build>
            </image>
        </images>
    </configuration>
</plugin>