Update Dockerfile

Dockerfile

@@ -62,7 +62,8 @@ RUN if [ ! -f "nn-9a0cc2a62c52.nnue" ]; then wget https://tests.stockfishchess.o
 # BACKEND SETUP
 # ============================================================
 WORKDIR /app
-RUN pip install --no-cache-dir fastapi uvicorn python-chess pydantic
+RUN pip install fastapi "uvicorn[standard]" websockets python-chess pydantic
+
 
 # Set PYTHONPATH to include all potential source directories
 ENV PYTHONPATH="/app:/app/server"