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/1.vue

@@ -1,9 +1,9 @@
 <template>
-  <div>
-    <p class="px-8 pt-8 text-center text-2xl">
+  <div class="flex flex-col items-center">
+    <p class="px-8 text-center text-2xl">
       {{ $t('setup.welcomeDesc') }}
     </p>
-    <NuxtLink to="/setup/2">
+    <NuxtLink to="/setup/2" class="mt-8">
       <BaseButton as="span">{{ $t('general.continue') }}</BaseButton>
     </NuxtLink>
   </div>