add a connector sample

[freeznet]

Fixes #

(or if this PR is one task of a github issue, please add Master Issue: #<xyz> to link to the master issue.)

Master Issue: #

Motivation

Explain here the context, and why you're making that change. What is the problem you're trying to solve.

Modifications

• add connector image sample
• fix runner base build error
• specific platform when build

Verifying this change

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This change is a trivial rework / code cleanup without any test coverage.

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This change is already covered by existing tests, such as (please describe tests).

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This change added tests and can be verified as follows:

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• Added integration tests for end-to-end deployment with large payloads (10MB)
• Extended integration test for recovery after broker failure

Documentation

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[github-actions]

@freeznet:Thanks for your contribution. For this PR, do we need to update docs?
(The PR template contains info about doc, which helps others know more about the changes. Can you provide doc-related info in this and future PR descriptions? Thanks)

[github-actions]

@freeznet:Thanks for providing doc info!

[imaffe]

Just curious, did these docker images got pushed to remote container registry (seem the es sample connector is not pushed to kind as well)? How will these containers be used ?

[freeznet]

Just curious, did these docker images got pushed to remote container registry (seem the es sample connector is not pushed to kind as well)? How will these containers be used ?

this is just act as a sample Dockerfile to show user how to build a connector image.