detect machine arch

[mliang2]

This PR fixes #

Checklist

• I have signed the CLA
• I have updated/added any relevant documentation

Description

What's the goal of this PR?

Current version hard codes to amd64 architecture. This MR auto detect the architecture to better support arm64 based systems such as Apple M1/M2 CPUs and Linux on ARM64 chips

What changes did you make?

Modified 2 lines auto detect machine architecture via uname -m

What alternative solution should we consider, if any?

None

[CLAassistant]

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1 out of 2 committers have signed the CLA.

✅ mliang2
❌ Michael Leong

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