Update Dockerfile to set user and working directory

Dockerfile

@@ -6,6 +6,14 @@ COPY ./requirements.txt /code/requirements.txt
 
 RUN pip install --no-cache-dir --upgrade -r /code/requirements.txt
 
-COPY . .
+RUN useradd -m -u 1000 user
+USER user
+
+ENV HOME=/home/user \
+	PATH=/home/user/.local/bin:$PATH
+
+WORKDIR $HOME/app
+
+COPY --chown=user . $HOME/app
 
 CMD ["uvicorn", "main:app", "--host", "0.0.0.0", "--port", "7860"]