udpate: img src通过配置onerror字段实现图源容灾

astro.config.mjs

@@ -14,6 +14,7 @@ import remarkMath from "remark-math";
 import remarkSectionize from "remark-sectionize";
 import { AdmonitionComponent } from "./src/plugins/rehype-component-admonition.mjs";
 import { GithubCardComponent } from "./src/plugins/rehype-component-github-card.mjs";
+import { rehypeImageFallback } from "./src/plugins/rehype-image-fallback.mjs";
 import { parseDirectiveNode } from "./src/plugins/remark-directive-rehype.js";
 import { remarkExcerpt } from "./src/plugins/remark-excerpt.js";
 import { remarkReadingTime } from "./src/plugins/remark-reading-time.mjs";
@@ -65,6 +66,7 @@ export default defineConfig({
 		rehypePlugins: [
 			rehypeKatex,
 			rehypeSlug,
+			rehypeImageFallback,
 			[
 				rehypeComponents,
 				{