use WizardLM also for GPU

gpu.Dockerfile

@@ -1,5 +1,6 @@
 ARG CUDA_IMAGE="12.1.1-devel-ubuntu22.04"
 FROM nvidia/cuda:${CUDA_IMAGE}
+ENV MODEL=WizardLM-13B-V1.2
 
 # Install the package
 RUN apt-get update && apt-get upgrade -y \
@@ -17,9 +18,6 @@ RUN python3 -m pip install --upgrade pip pytest cmake scikit-build setuptools fa
 
 RUN CMAKE_ARGS="-DLLAMA_CUBLAS=on" FORCE_CMAKE=1 pip install llama-cpp-python
 
-# Run the server
-ENV MODEL=vicuna-13B-v1.5-16K-GGML
-
 # Set a working directory for better clarity
 WORKDIR /app