Resize map image

src/App.css

@@ -140,7 +140,7 @@ form button {
 #vom-admin-canvas {
   width: 100%;
   background-color: #F2F2F2;
-  background-image: url('merseyside-nobg-4_5-LABELED.png');
+  background-image: url('merseyside-nobg-4_5-LABELED-low.png');
   background-position: top left;
   background-size: contain;
   background-repeat: no-repeat;