Add custom BigBlueButton landing page option

By default the Nginx config for Greenlight containers has:

  # BigBlueButton landing page.
  location / {
    root   /var/www/bigbluebutton-default;
    index  index.html index.htm;
    expires 1m;
  }

The source for the /var/www/bigbluebutton-default directory is here:

• https://github.com/bigbluebutton/bigbluebutton/tree/develop/bigbluebutton-config/web

It would be useful to be able to specify a different root directory to be cloned using git, for example:

          bbb_greenlight_containers:
            default:
              root_repo: https://git.coop/meet/landing-page.git

And then Ansible would clone this directory to a directory based on the container name:

- git:
    repo: https://git.coop/meet/landing-page.git
    dest: "/var/www/{{ container.key }}"
    update: true
    force: true
   when: container.value.root_repo is defined

However I'm not quite sure when the files in /var/www/bigbluebutton-default are used other than for the hosting the default presentation dpf?