To create the project you have to run
docker compose up -d
This creates two services, one with the postgreSQL database and the other one with grafana.
Once set, you can go to localhost:3000 and enter your username and password (admin and foobar).
The datasource is already set in grafana thanks to the file called automatic.yml inside the provisioning folder. Also, tables are created using the csv files inside the data foler. Moreover, folders db and grafana hold the information of the respective services. Finally, the environment folder contains the environment files needed for each service.