About set the img to Center

[MugenLee]

Is your feature request related to a problem? Please describe.

In minimal, I want to center the picture, but after checking minimal.guide/ I found that there is no way to achieve it.
The default effect is that the picture is centered on the left
like this:

Describe the solution you'd like
I hope there is a way to center the image so that the layout will look better.
As I know, you can set the table center in YAML through table-center. I don’t know if img can do it.
This is effective for a file.md. It would be great if you could provide settings for the OB library and individual files.
like this: