Tweak the config.go file and put your database details in there. Import data.sql into the same database. Comment out the first line (put /* and */ around it), if you've already made a database, and don't want the script to generate it for you.
Set the password column of your user account in the database to what you want your password to be. The system will encrypt your password when you login for the first time.
Oh my, you caught me right at the start of this project. There's nothing to see here yet, asides from the absolute basics. You might want to look again later!