Create Dependabot Configuation to support Docker and go module updates

[zhuxiaow0]

Enable Dependabot for Dockerfile and go.mod updates. This will update images in Dockerfile FROM statements, and go modules.

This PR is created by a script. Please let me know if we should modify any values.

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[jingyuanliang]

/assign @MrHohn

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[APPROVALNOTIFIER] This PR is APPROVED

This pull-request has been approved by: MrHohn, zhuxiaow0

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