Ticket 50584, 49212 - docker healthcheck and configuration
    
    Bug Description: Docker is managed by providing values from the
    environment. To know if this is ready to make changes to our
    local instance, we need to be able to check the instance is
    healthy. In addition, docker has a health check process which
    can allow monitoring and management of instances as they start.
    
    Fix Description: This provides a healthcheck tool and allows
    configuration by the envirnoment for the directory manager
    password, and allows indicating via the env to perform a
    db2index on startup.
    
    https://pagure.io/389-ds-base/issue/49212
    https://pagure.io/389-ds-base/issue/50584
    
    Author: William Brown <william@blackhats.net.au>
    
    Review by: ???