Official Docker image: Changing the document root

[vmb]

The official joomla:4-apache image installs into /var/www/html in the container. I am using docker-compose with persistent volumes accessible from the host. The official image works fine all I need to do is create a new website in /var/www/html . However, I need to restore an Akeeba backup from a cPanel host into a new Docker container. I can restore onto a bare-metal host without a problem, but not successfully into a Docker container. The only visible difference is the document root.

Is there an easy way to change the document root to install Joomla into /home/customer/public_html instead?

I was hoping that there would be an environment variable like 'APACHE_DOCUMENT_ROOT' but I don't appear to be that lucky. Do I really have to develop my own custom image to change the document root in the Docker container?

[Per Yngve Berg]

Docker will have it in the compose.yaml file.

Apache is configured by apache.conf