* add compose file
* add working configuration for ldap account manager
depends on https://github.com/LDAPAccountManager/lam/pull/76
Important note: the open source code of lam does not include the Kopano integration. So admins can generally manage users, but to add kopano attributes admins would need to switch to the ldap tree view.
* use :7.0.RC1 as this is the first image that supports automatic setup
