Fix/add configurable healthcheck settings

[cloudboyd]

As this module is also being called by other modules, so if this PR is ok to be merged, the new module version might need to be updated in other calling modules as well e.g. collector_pubsub.

[snowplowcla]

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[cloudboyd]

Thanks for your pull request. Is this your first contribution to a Snowplow open source project? Before we can look at your pull request, you'll need to sign a Contributor License Agreement (CLA).

📝 Please visit https://docs.snowplowanalytics.com/docs/contributing/contributor-license-agreement/ to learn more and sign.

Once you've signed, please reply here (e.g. I signed it!) and we'll verify. Thanks.

I signed it.

[snowplowcla]

Confirmed! @cloudboyd has signed the Contributor License Agreement. Thanks so much.