Update Dockerfile

Dockerfile

@@ -11,12 +11,13 @@ ENV HOME=/home/user \
 # Switch to the "user" user
 USER user
 
-# Copy the rest of the application code
-COPY --chown=user . $HOME/app
-
 # Create the app directory
 WORKDIR $HOME/app
 
+# Copy the application code and the requirements.txt file
+COPY --chown=user requirements.txt $HOME/app
+COPY --chown=user . $HOME/app
+
 # Install requirements.txt
 RUN pip install --no-cache-dir --upgrade -r requirements.txt