redone backend handling and config parsing

app/WebSocketApp.hs

@@ -77,6 +77,7 @@ clientLogic conn sessionStateMVar = do
         hPrint stderr msg
     )
     -- the next line is a bit ugly, maybe there is a better way?
+    -- maybe refactor, so that the request Handler can choose to lock or not. -- TODO
     (\request -> modifyMVar_ sessionStateMVar (\sessionState -> requestHandler conn sessionState request))
     (decodeStrict msg :: Maybe TL.JSONRequest)
   clientLogic conn sessionStateMVar
@@ -102,7 +103,7 @@ requestHandler conn (tl, pl, cls, sem) (TL.InitializeTickLeisteR preTickLeiste)
 
 -- TODO
 -- Also TickLeisteR must be inside the modifyMVar, because we use the MVar also as a lock, and we can't
--- have changes between reading the TickLeiste and sending it.
+-- have changes between reading the TickLeiste and sending the information.
 requestHandler conn ss@(tl, pl, cls, sem) TL.TickLeisteR = do
   sendClientEvent (TL.InitializeTickLeisteE $ tickLeisteToPlayerList pl tl) conn
   return ss