It's built with Go and PostgreSQL.
cp config/database.env.example config/database.env
After it install migrate tool (https://github.com/golang-migrate/migrate/tree/v4.17.1/cmd/migrate) and run migrations
export POSTGRESQL_URL='postgres://postgres:password@localhost:5432/example?sslmode=disable'
migrate -database ${POSTGRESQL_URL} -path db/migrations up