Header to it's own component.

src/components/header.tsx

@@ -0,0 +1,10 @@
+import "./../styles/header.css"
+
+export const Header = () => {
+    return (
+        <header className="App-header">
+            <h1>Lintu ja Maslo</h1>
+            <p><i>Elokuussa 2022</i></p>
+        </header>
+    )
+}