Feat: Initial Setup through env vars (#1736)

* initial support for initial setup

* improve setup

* improve mobile view

* move base admin route

* admin panel mobile view

* set initial host and port

* add docs

* properly setup everything, use for dev env

* change userconfig and interface port on setup, note users afterwards

src/app/pages/setup/success.vue

@@ -1,7 +1,7 @@
 <template>
-  <div>
+  <div class="flex flex-col items-center">
     <p>{{ $t('setup.successful') }}</p>
-    <NuxtLink to="/login">
+    <NuxtLink to="/login" class="mt-4">
       <BaseButton as="span">{{ $t('login.signIn') }}</BaseButton>
     </NuxtLink>
   </div>