Translations (#72)

* Translations + danish

* changed back proxy target to use ENV

* Resolved more merge conflicts

* Removed test in translation

* Documentation of translations

* Updated translations

* removed old packages

Co-authored-by: Hayden <64056131+hay-kot@users.noreply.github.com>

frontend/src/pages/404Page.vue

@@ -5,9 +5,9 @@
       <v-col>
         <v-card height="">
           <v-card-text>
-            <h1>404 No Page Found</h1>
+            <h1>{{$t('404.page-not-found')}}</h1>
           </v-card-text>
-          <v-btn text block @click="$router.push('/')"> Take me Home </v-btn>
+          <v-btn text block @click="$router.push('/')"> {{$t('404.take-me-home')}} </v-btn>
         </v-card>
       </v-col>
       <v-col cols="2"></v-col>