Add a "readiness probe" to DIND in CI

Relates to https://repo1.dso.mil/platform-one/big-bang/bigbang/-/issues/187

This is a solution for the bullet 2 in that issue. It uses a basic bash script found in an upstream issue that will wait on DIND to be available before proceeding (or proceed after a minute and fail the way it would before). From what I've seen typically one retry is enough so I suspect the 12 retry/1 minute limit is sufficient unless we are having real problems.

This is required because upstream gitlab runners do not yet provide a way to specify readiness probes to the services used (see this issue as well as others upstream).

This is a "sister" to the package pipeline fix - https://repo1.dso.mil/platform-one/big-bang/pipeline-templates/pipeline-templates/-/merge_requests/64

changed milestone to %1.14.0

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mentioned in issue #187 (closed)

A little "proof this works": https://repo1.dso.mil/platform-one/big-bang/bigbang/-/jobs/5167295

View the start of the pipeline and you'll see it errored on the startup once, then succeeded. Note that in the version being merged this output is sent to /dev/null, this was done just for debug/testing.

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• 6c945f04 - dev null output

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Looks good. Nice find!

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merged

mentioned in commit b1e2c632

mentioned in issue #631 (closed)

mentioned in issue #632 (closed)