Update dockerfile

dockerfile

@@ -1,13 +1,16 @@
-FROM python:3.11-slim
+# Read the doc: https://huggingface.co/docs/hub/spaces-sdks-docker
+# you will also find guides on how best to write your Dockerfile
 
-WORKDIR /app
-
-COPY requirements.txt .
+FROM python:3.9
 
-RUN pip install --no-cache-dir -r requirements.txt
+RUN useradd -m -u 1000 user
+USER user
+ENV PATH="/home/user/.local/bin:$PATH"
 
-COPY . .
+WORKDIR /app
 
-EXPOSE 7860
+COPY --chown=user ./requirements.txt requirements.txt
+RUN pip install --no-cache-dir --upgrade -r requirements.txt
 
-CMD ["gunicorn", "--bind", "0.0.0.0:7860", "app:app"]
+COPY --chown=user . /app
+CMD ["uvicorn", "app:app", "--host", "0.0.0.0", "--port", "7860"]