[Docker] Create a symlink. (#169)

Signed-off-by: Alicia Wang <115451386+congw729@users.noreply.github.com>

Dockerfile

@@ -9,4 +9,6 @@ COPY . .
 # Install vllm-omni into the same uv-managed Python environment used by the base image.
 RUN uv pip install --python "$(python3 -c 'import sys; print(sys.executable)')" --no-cache-dir .
 
+RUN ln -sf /usr/bin/python3 /usr/bin/python
+
 ENTRYPOINT ["vllm", "serve", "--omni"]