feat: 이미지 최적화를 위한 WebP 포맷 변환 적용

Author: solbijae

images/menu_icon.webp

@@ -48,7 +48,12 @@
                         <li><a href="about.html">About us</a></li>
                         <li><a href="index.html#best-sellers-section">Best Sellers</a></li>
                         <li><a href="index.html#newsletter-section">Newsletter</a></li>
-                        <li class="menu-icon"><img src="images/menu_icon.png" ></li>
+                        <li class="menu-icon">
+                            <picture>
+                                <source srcset="images/menu_icon.webp" type="image/webp">
+                                <img src="images/menu_icon.png" alt="menu icon">
+                            </picture>
+                        </li>
                     </ul>
                 </nav>
             </div>