feat: added TOC (#198)

astro.config.mjs

@@ -41,7 +41,7 @@ export default defineConfig({
       animationClass: 'transition-swup-',   // see https://swup.js.org/options/#animationselector
                                             // the default value `transition-` cause transition delay
                                             // when the Tailwind class `transition-all` is used
-      containers: ['main'],
+      containers: ['main', '#toc'],
       smoothScrolling: true,
       cache: true,
       preload: true,