modify Dockerfile with copy requirements.txt line v4

Dockerfile

@@ -5,8 +5,7 @@ ENV HOME=/home/user \
     PATH=/home/user/.local/bin:$PATH
 WORKDIR $HOME/app
 COPY --chown=user . $HOME/app
-
-COPY ./requirements.txt $HOME/app/requirements.txt
+COPY ./requirements.txt ~/app/requirements.txt
 RUN pip install -r requirements.txt
-
+COPY . .
 CMD ["chainlit", "run", "app.py", "--port", "7860"]