Add warning message

src/components/NavBar.vue

@@ -2,7 +2,6 @@
   <v-app-bar style="flex-grow: 0" class="text-no-wrap">
     <v-toolbar-title>Bellingcat Auto Archiver demo tool</v-toolbar-title>
     <v-spacer></v-spacer>
-    <!-- <v-col class="nav-wrapper"> -->
     <v-btn v-if="!user" @click="$store.dispatch('signin')">Sign In</v-btn>
     <span class="user" v-if="user">
       {{ user.email }}
@@ -10,7 +9,6 @@
     <v-btn v-if="user" href="#" @click="$store.dispatch('signout')"
       >Sign Out</v-btn
     >
-    <!-- </v-col> -->
   </v-app-bar>
 </template>