fix(Dockerfile): Unable to build docker image

[cndoit18]

Signed-off-by: cndoit18 cndoit18@outlook.com

What is the purpose of the change

Fix the problem of not being able to build docker image
Use multi-stage builds to optimize

Brief changelog

Fix the problem of not being able to build docker image
Use multi-stage builds to optimize

Verifying this change

ghcr.io/cndoit18/rocketmq-dashboard:latest
This image can be run to test

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[cndoit18]

cc @zhangjidi2016