[userfront] source 개념삭제. redirect 동작 정리

userfront/Dockerfile

@@ -7,7 +7,7 @@ COPY . .
 # Get dependencies and build for web
 RUN flutter pub get
 RUN touch .env
-RUN flutter build web --release --no-tree-shake-icons
+RUN flutter build web --wasm --release --no-tree-shake-icons
 
 # Stage 2: Serve with Nginx
 FROM nginx:alpine