OCPBUGS-52420: Fix container file documentation with correct image embedding commands

[ggiguash]

Embedding bash commands in ExecStartPre= is cumbersome.
Simplify the docs by creating a separate script.

[openshift-ci-robot]

@ggiguash: This pull request references Jira Issue OCPBUGS-52420, which is invalid:

• expected the bug to be in one of the following states: NEW, ASSIGNED, POST, but it is ON_QA instead

Comment /jira refresh to re-evaluate validity if changes to the Jira bug are made, or edit the title of this pull request to link to a different bug.

The bug has been updated to refer to the pull request using the external bug tracker.

In response to this:

Embedding bash commands in ExecStartPre= is cumbersome.
Simplify the docs by creating a separate script.

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[ggiguash]

/jira refresh

[openshift-ci-robot]

@ggiguash: This pull request references Jira Issue OCPBUGS-52420, which is valid.

3 validation(s) were run on this bug

• bug is open, matching expected state (open)
• bug target version (4.19.0) matches configured target version for branch (4.19.0)
• bug is in the state POST, which is one of the valid states (NEW, ASSIGNED, POST)

Requesting review from QA contact:
/cc @jogeo

In response to this:

/jira refresh

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[pmtk]

/lgtm

[openshift-ci]

[APPROVALNOTIFIER] This PR is APPROVED

This pull-request has been approved by: ggiguash, pmtk

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• OWNERS [ggiguash,pmtk]

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[openshift-ci]

@ggiguash: all tests passed!

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[openshift-ci-robot]

@ggiguash: Jira Issue OCPBUGS-52420 is in an unrecognized state (Verified) and will not be moved to the MODIFIED state.

In response to this:

Embedding bash commands in ExecStartPre= is cumbersome.
Simplify the docs by creating a separate script.

Instructions for interacting with me using PR comments are available here. If you have questions or suggestions related to my behavior, please file an issue against the openshift-eng/jira-lifecycle-plugin repository.