modify Dockerfile with copy requirements.txt line v5

Dockerfile

@@ -3,9 +3,9 @@ RUN useradd -m -u 1000 user
 USER user
 ENV HOME=/home/user \
     PATH=/home/user/.local/bin:$PATH
-WORKDIR $HOME/app
+WORKDIR /app
 COPY --chown=user . $HOME/app
-COPY ./requirements.txt ~/app/requirements.txt
-RUN pip install -r requirements.txt
+COPY ./requirements.txt /app/requirements.txt
+RUN pip install -r /app/requirements.txt
 COPY . .
 CMD ["chainlit", "run", "app.py", "--port", "7860"]