update env setup

frontend/Dockerfile

@@ -19,15 +19,15 @@ COPY . .
 
 # Build arguments for environment variables
 ARG VITE_API_URL=http://localhost:3000
-ARG VITE_AUTHENTIK_URL
-ARG VITE_CLIENT_ID
+ARG AUTHENTIK_URL
+ARG AUTHENTIK_CLIENT_ID
 ARG VITE_APP_NAME="Feuerwehr Dashboard"
 ARG VITE_APP_VERSION="1.0.0"
 
 # Set environment variables for build
 ENV VITE_API_URL=$VITE_API_URL
-ENV VITE_AUTHENTIK_URL=$VITE_AUTHENTIK_URL
-ENV VITE_CLIENT_ID=$VITE_CLIENT_ID
+ENV AUTHENTIK_URL=$AUTHENTIK_URL
+ENV AUTHENTIK_CLIENT_ID=$AUTHENTIK_CLIENT_ID
 ENV VITE_APP_NAME=$VITE_APP_NAME
 ENV VITE_APP_VERSION=$VITE_APP_VERSION