How to publish Jenkins job icons externally?

I'm using Promoted Builds Plugin to assign certain icons to Jenkins jobs on certain conditions and I'd like to publish these promotion icons.

How can I generate external links to these icons per each job, so they're accessible externally?

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For example I'd like to create the table in README.md on GitHub like:

Job 1 | ![](link_to_icon_of_job_1)
Job 2 | ![](link_to_icon_of_job_2)
Job 3 | ![](link_to_icon_of_job_3)

The "Embeddable Build Status Plugin" will do exactly that.

Note: This requires your Jenkins server to be accessible from the internet if you're using GitHub because they cache all images in their CDN.

StackExchange DevOps Q#43, answer score: 11