Scaffold basic workshop frontend.

pages/404.js

@@ -0,0 +1,24 @@
+import Link from '@/components/Link'
+
+export default function FourZeroFour() {
+  return (
+    <div className="flex flex-col items-start justify-start md:justify-center md:items-center md:flex-row md:space-x-6 md:mt-24">
+      <div className="pt-6 pb-8 space-x-2 md:space-y-5">
+        <h1 className="text-6xl font-extrabold leading-9 tracking-tight text-gray-900 dark:text-gray-100 md:text-8xl md:leading-14 md:border-r-2 md:px-6">
+          404
+        </h1>
+      </div>
+      <div className="max-w-md">
+        <p className="mb-4 text-xl font-bold leading-normal md:text-2xl">
+          Sorry we couldn't find this page.
+        </p>
+        <p className="mb-8">But dont worry, you can find plenty of other things on our homepage.</p>
+        <Link href="/">
+          <button className="inline px-4 py-2 text-sm font-medium leading-5 text-white transition-colors duration-150 bg-blue-600 border border-transparent rounded-lg shadow focus:outline-none focus:shadow-outline-blue hover:bg-blue-700 dark:hover:bg-blue-500">
+            Back to homepage
+          </button>
+        </Link>
+      </div>
+    </div>
+  )
+}