fix dockerfile base image manifest unknown

[MartinDai]

What is the purpose of the change

fix dockerfile base image manifest unknown

Brief changelog

fix dockerfile base image manifest unknown

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[francisoliverlee]

thank you to fix this important issue.
and there still 2 fix should be done

1. add final name in pom.xml in build tag
2. ADD rocketmq-exporter-0.0.2-SNAPSHOT-exec.jar rocketmq-exporter.jar in docker file must depends on final-name in pom.xml

[MartinDai]

thank you to fix this important issue. and there still 2 fix should be done

1. add final name in pom.xml in build tag
2. ADD rocketmq-exporter-0.0.2-SNAPSHOT-exec.jar rocketmq-exporter.jar in docker file must depends on final-name in pom.xml

@francisoliverlee done