Improve 404 page + improve first article + Add favicon + fix content

layouts/error-2.vue

@@ -0,0 +1,17 @@
+<template>
+  <div class="dark:bg-dark-900 dark:text-white font-sans">
+    <Nuxt class="content"/>
+  </div>
+</template>
+
+<script>
+export default {
+  name: "error-2"
+}
+</script>
+
+<style scoped>
+.content {
+  min-height: calc(100vh - 118px);
+}
+</style>