app/app.vue

@@ -1,6 +1,5 @@
 <template>
   <div>
-    <NuxtRouteAnnouncer />
-    <NuxtWelcome />
+    <NuxtPage />
   </div>
 </template>

app/pages/[...all].vue

@@ -0,0 +1,17 @@
+<template>
+<main p="x4 y10" text="center teal-700 dark:gray-200">
+    <div text4xl>
+        <div i-ep-warning inline-block />
+    </div>
+    <div>Not found</div>
+    <div>
+        <button text-sm btn m="3 t8" @click="router.back()">
+            Back
+        </button>
+    </div>
+</main>
+</template>
+
+<script setup lang="ts">
+const router = useRouter()
+</script>

app/pages/index.vue

@@ -0,0 +1,5 @@
+<template>
+    <div>
+        <NuxtWelcome />
+    </div>
+</template>