Ankio is built on a postgres database, which much be configured manually before you can start using the server. If you do not yet have postgres installed on a machine in your development environment, do that first. (The documentation already avaliable on that topic is superior to anything we could offer herein.)
Once you have Postgres installed, create a new database by typing createdb
command in your terminal.
$ createdb ankio
$ psql ankio
ankio=#
You should be greeted with the postgres prompt inside your new database.