Update Dockerfile

Dockerfile

@@ -29,6 +29,7 @@ RUN python -m pip install --upgrade -i "$PIP_INDEX" pip && \
     pip install torch torchvision torchaudio --index-url https://download.pytorch.org/whl/cpu && \
     pip install -i "$PIP_INDEX" --upgrade-strategy only-if-needed -r /inference/xinference/deploy/docker/requirements_cpu.txt && \
     pip install "llama-cpp-python==0.2.77" --extra-index-url https://abetlen.github.io/llama-cpp-python/whl/cpu && \
+    pip install litellm \
     pip install 'litellm[proxy]' \
     cd /inference && \
     python setup.py build_web && \