* Move multiple defaults from entrypoint script to cfg.lua files.
* Move remaining defaults from entrypoint script to cfg.lua files.
* Update postgres version in tests
* Register users with prosodyctl in tests
* Replace 'docker-compose' with 'docker compose'
This commit updates the docker-compose.yml file to use example.com domain instead of localhost.
It also adds a new Prosody instance using LDAP authentication with glauth as the backend. The commit also includes a new file config.cfg for the glauth server configuration.