style: add horizontal centering and box-shadow to the images in the posts.

Author: zhongyangxun

src/components/Prose.astro

@@ -9,7 +9,9 @@
     /* 引用 */
     prose-blockquote:text-neutral-500 prose-blockquote:not-italic prose-blockquote:border-l-2 prose-blockquote:font-normal
     /* 列表 */
-    prose-li:my-1"
+    prose-li:my-1
+    /* 图片 */
+    prose-img:mx-auto prose-img:shadow-md"
 >
   <slot />
 </article>