Structure improved, program added

pages/_app.tsx

@@ -1,8 +1,18 @@
 import '../styles/globals.scss';
 import type { AppProps } from 'next/app';
+import { Footer } from './components/Footer';
+import { Header } from './components/Header';
 
 function MyApp({ Component, pageProps }: AppProps) {
-  return <Component {...pageProps} />;
+  return (
+    <>
+      <Header />
+      <main>
+        <Component {...pageProps} />
+      </main>
+      <Footer />
+    </>
+  );
 }
 
 export default MyApp;