@selzero Is the container that hosts the website just out of date? Or do they want you to make changes to the existing website without pulling a newer version of the container?
I like using compose - so there's a yaml file with all the container build info
So if the container just needs to be updated:
In the folder with the compose.yaml
sudo docker-compose down
sudo docker-compose pull
sudo docker-compose up
The container is now uupdated