style: add appropriate pride-month background

_sass/_chaospott.scss

@@ -91,8 +91,9 @@ a {
 }
 
 #large-header {
-  background: #222 url('/images/logowall.svg') center top;
-  background-size: 450px;
+  background: url('/images/pride_flag.svg'); // pride month background
+  //background-size: 450px;
+  //background: #222 url('/images/logowall.svg') center top;
   height: 228px;
   margin: 0 0 170px 0;