rust parser working on local build. fix docker build

src/app/page.tsx

@@ -33,6 +33,7 @@ export default function Home() {
   const [search, setSearch] = useState('');
   const [isLoading, setIsLoading] = useState(false);
   const [lastUpdate, setLastUpdate] = useState<Date | null>(null);
+  const [error, setError] = useState<string | null>(null);
 
   // Get blog owner from env
   const blogOwner = process.env.NEXT_PUBLIC_BLOG_OWNER || 'Anonymous';
@@ -99,12 +100,17 @@ export default function Home() {
   const loadTree = async () => {
     try {
       setIsLoading(true);
+      setError(null);
       const response = await fetch('/api/posts');
+      if (!response.ok) {
+        throw new Error(`API error: ${response.status}`);
+      }
       const data = await response.json();
       setTree(data);
       setLastUpdate(new Date());
     } catch (error) {
       console.error('Fehler beim Laden der Beiträge:', error);
+      setError(error instanceof Error ? error.message : String(error));
     } finally {
       setIsLoading(false);
     }
@@ -168,6 +174,12 @@ export default function Home() {
 
   return (
     <main className="container mx-auto px-3 sm:px-4 py-4 sm:py-8">
+      {/* Error display */}
+      {error && (
+        <div className="mb-4 p-4 bg-red-100 text-red-800 rounded">
+          <strong>Fehler:</strong> {error}
+        </div>
+      )}
       {/* Mobile-first header section */}
       <div className="mb-6 sm:mb-8 space-y-4 sm:space-y-0 sm:flex sm:flex-row sm:gap-4 sm:items-center sm:justify-between">
         <h1 className="text-2xl sm:text-3xl md:text-4xl font-bold text-center sm:text-left">{blogOwner}&apos;s Blog</h1>