added check answer summary & complete appeal step

pages/_error.js

@@ -0,0 +1,16 @@
+function Error({ statusCode }) {
+    return (
+        <p>
+            {statusCode
+                ? `An error ${statusCode} occurred on server`
+                : "An error occurred on client"}
+        </p>
+    );
+}
+
+Error.getInitialProps = ({ res, err }) => {
+    const statusCode = res ? res.statusCode : err ? err.statusCode : 404;
+    return { statusCode };
+};
+
+export default Error;