chore: Update Dockerfile to use uv for pip installation and set user to root

Dockerfile

@@ -2,6 +2,7 @@ FROM python:3.11
 
 WORKDIR /code
 
+USER root
 ADD --chmod=755 https://astral.sh/uv/install.sh /install.sh
 RUN /install.sh && rm /install.sh
 
@@ -11,4 +12,6 @@ RUN /root/.cargo/bin/uv pip install --system --no-cache -r requirements.txt
 
 COPY ./app /code/app
 
+USER user
+
 CMD ["uvicorn", "app.main:app", "--host", "0.0.0.0", "--port", "7860"]