index.html ist drin

templates/index.html

@@ -0,0 +1,12 @@
+<!DOCTYPE html>
+<html lang="de">
+<head>
+    <meta charset="UTF-8">
+    <meta name="viewport" content="width=device-width, initial-scale=1.0">
+    <title>Meine Bücherverwaltung</title>
+    <link rel="stylesheet" href="{{ url_for('static', filename='css/bootstrap.min.css') }}">
+</head>
+<body>
+    <script src="{{ url_for('static', filename='js/bootstrap.bundle.min.js') }}"></script>
+</body>
+</html>