Add uMap log

umap/static/umap/umap.css

@@ -163,12 +163,15 @@ nav a {
     text-align: center;
 }
 
-nav a:hover, nav h1 a {
+nav a:hover {
     background-color: SeaGreen;
 }
 
 nav h1 a {
-    font-weight: bold;
+    background-position: 50% 50%;
+    background-repeat: no-repeat;
+    background-image: url("./umap.png");
+    color: transparent;
 }
 
 nav a.logout {