Make logo link to "/" instead of pulling setting from config

src/components/Navbar.vue

@@ -4,7 +4,7 @@
       <div v-if="logo">
         <a v-if="$static.metadata.ghost.logo"
         class="site-nav-logo"
-        :href="$static.metadata.siteUrl||$static.metadata.ghost.url">
+        href="/">
           <img :src="$static.metadata.ghost.logo"
           :alt="$static.metadata.siteName||$static.metadata.ghost.title">
         </a>