Merge pull request 'Change type background' (#79) from feature/20250521-update-doc into develop

Reviewed-on: #79

src/pages/index.module.css

@@ -8,7 +8,7 @@
   text-align: center;
   position: relative;
   overflow: hidden;
-  background: url('/img/background.png');
+  background: url('/img/background.jpg');
   background-size: cover;
   background-position: center;
   background-repeat: no-repeat;
@@ -16,7 +16,7 @@
 }
 
 [data-theme='dark'] .heroBanner {
-  background: url('/img/background.png');
+  background: url('/img/background.jpg');
   background-size: cover;
   background-position: center;
   background-repeat: no-repeat;