Trying running after copying?

Dockerfile

@@ -86,11 +86,10 @@ USER user
 # Python packages
 RUN --mount=target=requirements.txt,source=requirements.txt \
     pip install --no-cache-dir --upgrade -r requirements.txt
-
-RUN --mount=target=/home/user/on_startup_user.sh,source=on_startup_user.sh,readwrite \
-	bash /home/user/on_startup_user.sh
 # Copy the current directory contents into the container at $HOME/app setting the owner to the user
 COPY --chown=user . $HOME/app
+RUN --mount=target=/home/user/app/on_startup_user.sh,source=on_startup_user.sh,readwrite \
+	bash /home/user/app/on_startup_user.sh
 
 RUN chmod +x start_server.sh