Update Dockerfile

Dockerfile

@@ -1,20 +1,20 @@
-FROM python:3.8.10
+FROM python:3.9
 
-WORKDIR /app
+WORKDIR /code
 
-RUN pip3 install --no-cache-dir -r requirements.txt
+COPY ./requirements.txt /code/requirements.txt
+
+RUN pip install --no-cache-dir --upgrade -r /code/requirements.txt
 
-# Set up a new user named "user" with user ID 1000
 RUN useradd -m -u 1000 user
 
-# Switch to the "user" user
 USER user
 
-# Set home to the user's home directory
 ENV HOME=/home/user \
 	PATH=/home/user/.local/bin:$PATH
 
-# Copy the current directory contents into the container at $HOME/app setting the owner to the user
+WORKDIR $HOME/app
+
 COPY --chown=user . $HOME/app
 
 EXPOSE 8501