Error page when can't find file / folder

src/app/not-found.tsx

@@ -0,0 +1,39 @@
+import Link from "next/link";
+
+function NotFound() {
+  return (
+    <div
+      className={
+        "relative flex h-full min-h-[80dvh] w-full flex-grow flex-col items-center justify-center gap-8"
+      }
+    >
+      {/* Image placeholder */}
+      <div
+        className={
+          "grid h-48 w-48 place-items-center rounded-lg bg-blue-300 font-semibold text-zinc-900"
+        }
+      >
+        Placeholder Image
+      </div>
+
+      <div
+        className={
+          "flex max-w-screen-lg flex-col items-center gap-2"
+        }
+      >
+        <h1 className={"font-semibold"}>
+          Error 404: Not Found
+        </h1>
+        <p className={"font-medium"}>
+          The file or folder you are trying to access does
+          not exist or has been deleted.
+        </p>
+        <Link href={"/"}>
+          <button>Go back to home</button>
+        </Link>
+      </div>
+    </div>
+  );
+}
+
+export default NotFound;