put heros background as hero.png and the dimensions will be 1536×1024 pixels - Follow Up Deployment

index.html

@@ -24,7 +24,10 @@
         }
         
         .hero-bg {
-            background-color: #fff;
+            background-image: url('hero.png');
+            background-size: cover;
+            background-position: center;
+            background-repeat: no-repeat;
         }
         
         .section-bg {