Make a better article section and add the article page.

front/src/pages/MainPage.tsx

@@ -5,11 +5,11 @@ import Footer from '../components/Footer.tsx'
 export default function MainPage() {
     return (
         <>
-        <div>
+        <div style={{ display: 'flex', flexDirection: 'column', minHeight: '100vh' }}>
             <NavBar />
             <ArticlesSection />
+            <Footer bgcolor="blue"/>
         </div>
-        <Footer bgcolor="blue"/>
         </>
     )
 }