Alternative way to center-align image when disable "markdown-it-attrs"

[RingsGit]

In order to address the rendering issue with KaTeX in markdown text, I've disabled the plugin markdown-it-attrs. However, this action has also disabled the code ![imageName](pathToImage){.align-center} for centering images.

How can I center all images on every page without altering the Markdown syntax for inserting images, similar to how it's done in Obsidian by inserting a block of CSS code? Thank you.

OS: windows 10
Node.js: 20.12.0
Wiki.js version: 2.5.301
Database engine: PostgreSQL 16.2

[RingsGit]

Administration -> Theme -> Code injection -> CSS

.contents img {
  display: block;
  margin: 0 auto;
}