fix image shadow on logos

docs/more/sponsors.md

@@ -55,3 +55,11 @@ These companies help the Homepage project by providing services, tools, and reso
     </p>
   </div>
 </div>
+
+<style>
+.md-typeset img,
+.md-typeset svg,
+.md-typeset video {
+  box-shadow: none;
+}
+</style>

docs/stylesheets/extra.css

@@ -92,7 +92,7 @@
 }
 
 body {
-  background-image: url("/assets/blossom_valley.jpg");
+  background-image: url("https://raw.githubusercontent.com/gethomepage/homepage/main/docs/assets/blossom_valley.jpg");
   background-size: cover;
   background-attachment: fixed;
   background-position: center;