fix: base url in header image

src/layouts/ArticleLayout.astro

@@ -7,6 +7,7 @@ import { getBaseUrl, buildPageTree, buildBreadcrumbs } from "@utils";
 import { LANGUAGES } from "@config";
 import type { IPage } from "@interfaces/IPage";
 import { format } from "node:util";
+import { prefixWithBaseUrlIfNotExternal } from "@utils/Url";
 
 type Props = MarkdownLayoutProps<{
   title: string;
@@ -60,7 +61,10 @@ const breadcrumbs = buildBreadcrumbs(breadcrumbItems, url as string, baseUrl);
       hideFooterSeparator={frontmatter.hideFooterSeparator}
       title={frontmatter.title}
       subtitle={frontmatter.subtitle}
-      titleImage={baseUrl + frontmatter.headerImage}
+      titleImage={prefixWithBaseUrlIfNotExternal(
+        frontmatter.headerImage,
+        baseUrl
+      )}
       tags={frontmatter.tags}
       teaser={frontmatter.teaser || frontmatter.description}
       dateAndAuthor={`${frontmatter.date || ""}${