install requirements.txt after copy step

Dockerfile

@@ -14,18 +14,15 @@ ENV HOME=/home/user \
 # Set the working directory to the user's home directory
 WORKDIR $HOME/app
 
-# Copy the current directory contents into the container at /app
-ADD . /app
-
 # Try and run pip command after setting the user with `USER user` to avoid permission issues with Python
 RUN pip install --no-cache-dir --upgrade pip
 
-# Install any needed packages specified in requirements.txt
-RUN pip install --no-cache-dir -r requirements.txt
-
 # Copy the current directory contents into the container at $HOME/app setting the owner to the user
 COPY --chown=user . $HOME/app
 
+# Install any needed packages specified in requirements.txt
+RUN pip install --no-cache-dir -r requirements.txt
+
 # Make port 7860 available to the world outside this container
 EXPOSE 7860