Thanks Jakub!

was the last image in the article really just a black and white image of the words "Nightly builds Placeholder image" ?

I don't know. I guess we can replace it with something post-publication if Jakub wants. I kind of think he would have just used text if it was a placeholder for another image. Since he went to the trouble of uploading that to the media library, I assumed he meant for it to be there. That last one was a little different from a normal Copr package in that it was a way to use Copr itself rather than something packaged in Copr (I think). I don't really use Copr myself.

was the last image in the article really just a black and white image of the words "Nightly builds Placeholder image" ?

No, that was a placeholder image that I hoped you could replace with something appropriate :-)
That's why I added needs-image tag to this issue.

I guess we can replace it with something post-publication if Jakub wants

I should have better explained it when creating the issue, I am sorry. Please either replace the image with some cool image that is related to testing, CI, nightly builds, or something, or please just remove it from the article and leave the last section without an image.

I see. Sorry about that. I'll see what I can come up with.

The image has been replaced. Hopefully the connection isn't too difficult for people to figure out. I guess it will give people something to lookup and learn about if they don't know already.

Excerpt from Wikipedia:

... As a punishment for his trickery, Hades made Sisyphus roll a huge boulder endlessly up a steep hill. ... which ended up consigning Sisyphus to an eternity of useless efforts and unending frustration. Thus it came to pass that ... interminable activities are sometimes described as "Sisyphean". ...