feat: assets move + comments migration + admin users UI

client/components/not-found.vue

@@ -2,7 +2,7 @@
   v-app
     .notfound
       .notfound-content
-        img.animated.fadeIn(src='/svg/icon-delete-file.svg', alt='Not Found')
+        img.animated.fadeIn(src='/_assets/svg/icon-delete-file.svg', alt='Not Found')
         .headline {{$t('notfound.title')}}
         .subheading.mt-3 {{$t('notfound.subtitle')}}
         v-btn.mt-5(color='red lighten-4', href='/', large, outlined)