* build

```
make
```

* run

```
./main 'postgresql://begerad:secret@localhost:5432/sib00_vbn_gtfs'
```

* or run

```
./main 'postgresql://begerad:secret@localhost:5432/vbn_data'
```

* or run

```
./main "host=localhost port=5432 user=begerad password=<secret> dbname=vbn_data"
```