I’m not sure that’s something we would want to maintain… It takes around 5 minutes to set it up on our existing nginx or swag containers and we have a pretty good guide on handling it. The problem with saying a “standard” image for wordpress is, what standard? suiting whom? everyone runs their wordpress a little differently and has different plugin needs, example, imagick vs gd. We know imagick is broken in the latest alpine and the alpine devs don’t seem to be interested in fixing it.
It’s better to offer a standard webserver where you can easily install wordpress along with whatever plugins you’d like.