update Dockerfile for HF

Dockerfile

@@ -1,11 +1,15 @@
+
+# reference: https://huggingface.co/spaces/key2xanadu/hello-world-docker
+# 
 FROM python:3.11
-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
-COPY ./requirements.txt ~/app/requirements.txt
-RUN pip install -r requirements.txt
+
+WORKDIR /code
+
+COPY ./requirements.txt /code/requirements.txt
+
+
+RUN pip install --no-cache-dir --upgrade -r /code/requirements.txt
+
 COPY . .
-CMD ["chainlit", "run", "app.py", "--port", "7860"]
+
+CMD ["chainlit", "run", "app.py", "--host", "0.0.0.0", "--port", "7860"]