optimized background image

Author: cuhsat

static/css/fox.css

@@ -20,7 +20,7 @@
   background-color: white;
   background-image:
       linear-gradient(to bottom, transparent 65%, white),
-      url("../img/main.png");
+      url("../img/main.jpg");
   background-repeat: no-repeat;
   background-position: center;
   background-size: cover;