minor latex update

astro.config.mjs

@@ -2,6 +2,7 @@ import { defineConfig } from 'astro/config'
 import preact from '@astrojs/preact'
 
 import mdx from '@astrojs/mdx'
+import remarkMath from 'remark-math'
 
 import yaml from '@rollup/plugin-yaml'
 
@@ -14,6 +15,7 @@ export default defineConfig({
         port: 3000,
     },
     markdown: {
+        remarkPlugins: [remarkMath],
         shikiConfig: {
             theme: 'github-light',
         },
@@ -22,7 +24,9 @@ export default defineConfig({
         preact({
             compat: true,
         }),
-        mdx(),
+        mdx({
+            remarkPlugins: [remarkMath],
+        }),
     ],
     output: 'static',
 })