Unifi controller v 5.2.9
Repo and Software information available here http://community.ubnt.com/t5/UniFi-Updates-Blog/UniFi-5-2-9-is-released/ba-p/1694199
Ensure you have docker engine and docker-compose installed. To start the controller do:
docker-compose up -d
As long as docker is set to start at boot your controller will autostart.
I have mapped persistent data in the docker-compose.yml to /opt/docker/unifi (Modify this accordingly on your system if you wish) with read/write access.
To access your controller in a browser goto https://localhost:8443
Any issues please let me know.