Update volume paths to prevent warning
Update volume paths to prevent warning

See also https://github.com/docker/docker/pull/14242

The warning messages were

```
Warning: the mapping "logs:/var/log/postgresql" in the volumes config
for service "database" is ambiguous. In a future version of Docker, it
will designate a "named" volume (see docker/docker#14242). To prevent
unexpected behaviour, change it to "./logs:/var/log/postgresql"
Warning: the mapping "data:/var/lib/postgresql" in the volumes config
for service "database" is ambiguous. In a future version of Docker, it
will designate a "named" volume (see docker/docker#14242). To prevent
unexpected behaviour, change it to "./data:/var/lib/postgresql"
```

CanalTP/Chaos,CanalTP/Chaos