Hotfix: Groups

WebsiteBackend/src/de/steamwar/data/Groups.kt

@@ -37,6 +37,9 @@ class Groups {
         private var groups: GroupsData = if (kGroupsFile.exists()) {
             Cbor.decodeFromByteArray(kGroupsFile.readBytes())
         } else {
+            if (!kGroupsFile.parentFile.exists()) {
+                kGroupsFile.parentFile.mkdirs()
+            }
             kGroupsFile.createNewFile()
             kGroupsFile.writeBytes(Cbor.encodeToByteArray(GroupsData(mutableListOf())))