website/routes/imports/markdown_css.ts

import { Handlers } from '$fresh/server.ts'
import { CSS, KATEX_CSS } from '@deno/gfm'

export const handler: Handlers = {
	GET() {
		const styles = CSS + KATEX_CSS
		return new Response(styles, {
			headers: {
				'Content-Type': 'text/css; charset=utf-8',
				// TODO add cache headers and eTag
			},
		})
	},
}