Add how to configure Content Security Policy (CSP) rules in OpenSearch Dashboards dynamically

[tianleh]

Description

This PR is to add instructions to configure CSP rules in OSD.

Issues Resolved

Closes #6139

Checklist

• By submitting this pull request, I confirm that my contribution is made under the terms of the Apache 2.0 license and subject to the Developers Certificate of Origin.
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[tianleh]

Fixing the style check errors

https://github.com/opensearch-project/documentation-website/actions/runs/8273880069/job/22638379623?pr=6291

[tianleh]

Hi, @hdhalter and team, please help take a look.

cc @seraphjiang

[hdhalter]

Added @vagimeli as a reviewer since it involves Dashboards.

[tianleh]

@tianleh Doc review is complete. Please provide me with the link to the README file, and I'll add it where needed. Once you've accepted my edits, I'll move this into editorial review and then merge the PR. If my edits chage technical accuracy, please provide alternative text in your comments, and I'll make the change. Thank you, @vagimeli

@vagimeli Thanks for the review! I just accepted your edits.

Below are the links to the two readme files.

This is for the application configuration https://github.com/opensearch-project/OpenSearch-Dashboards/blob/main/src/plugins/application_config/README.md

This is for the csp handler https://github.com/opensearch-project/OpenSearch-Dashboards/blob/main/src/plugins/csp_handler/README.md

[tianleh]

Accidentally flushed your changes. Let me re-apply them. @vagimeli

[tianleh]

@vagimeli please take a look again

[vagimeli]

@vagimeli please take a look again

@tianleh Thank you for the links. I've reviewed and moved the PR into the editorial review queue. Once the editor (@natebower) reviews, I'll incorporate any edits. If the editor has technical-related questions, I'll reach out to you as needed. Once the PR is approved and finalized, I'll merge it. Cheers, @vagimeli

[natebower]

@tianleh @vagimeli Please see my comments and changes and let me know if you have any questions. Thanks!

[natebower]

Should this match H1? Or "Dynamic configuration of CSP rules"?

[vagimeli]

Yes. I missed that change.

[natebower]

Is "that lack it" necessary here (it reads slightly awkwardly), or could the sentence just end at "rules"? Or maybe "when necessary" instead?

[tianleh]

@tianleh Thank you for the links. I've reviewed and moved the PR into the editorial review queue. Once the editor (@natebower) reviews, I'll incorporate any edits. If the editor has technical-related questions, I'll reach out to you as needed. Once the PR is approved and finalized, I'll merge it. Cheers, @vagimeli

Hi, @vagimeli

I have gone through @natebower 's comments. They look like all about editorial aspects instead of technical aspects. Let me know if there is any action item at my side or you will take care of it.

[vagimeli]

@tianleh Thank you for the links. I've reviewed and moved the PR into the editorial review queue. Once the editor (@natebower) reviews, I'll incorporate any edits. If the editor has technical-related questions, I'll reach out to you as needed. Once the PR is approved and finalized, I'll merge it. Cheers, @vagimeli

Hi, @vagimeli

I have gone through @natebower 's comments. They look like all about editorial aspects instead of technical aspects. Let me know if there is any action item at my side or you will take care of it.

@tianleh I've handled editorial.

[vagimeli]

Doc and editorial reviews completed