Supply a Docker image of `vesoft/nebula-agent` for the ARM64 platform

[ytxmobile98]

Is your feature request related to a problem? Please describe.

I am going to deploy Nebula Graph in my corporation network which runs ARM64 machines as service clusters. It came to my attention that the vesoft/nebula-agent Docker image has not provided tags for the linux/arm64 platform.

Describe the solution you'd like

I would like to see if ARM64 support for Docker image vesoft/nebula-agent may be added. I really appreciate it.

Describe alternatives you've considered

I can still build it from source code. But the official Docker image would be a big time-saver!

Additional context

N/A