Use light-openid to reduce code base size (#4)

Refactor code to publicly share "redundant" code

Reviewed-on: #4

assets/cover.css

@@ -34,6 +34,10 @@ main {
  * Header
  */
 
+.title {
+    color: white;
+}
+
 .nav-masthead .nav-link {
   color: rgba(255, 255, 255, .5);
   border-bottom: .25rem solid transparent;