Add config file and error page

src/routes/+error.svelte

@@ -0,0 +1,18 @@
+<script>
+    // @ts-nocheck
+
+    import { page } from "$app/stores";
+    import { goto } from "$app/navigation";
+
+    async function goHome() {
+        goto("/");
+    }
+</script>
+
+<article class="text-center font-extrabold text-4xl mt-16">
+    <h1>{$page.error.message}</h1>
+</article>
+
+<div class="flex justify-center items-center">
+    <button class="btn btn-primary" on:click={goHome}>Go Home</button>
+</div>