SUGGESTION - a couple of improvements on the docker-compose.yml file

- A bit of logging under db service

```
logging:
      driver: json-file
      options:
        max-size: "10m"
        max-file: "3"
```

- declaration of volumes for the wiki container so that it avoids build errors for accessing the folder if needing additional permissions on the host

```
    ....
    volumes:
      - wiki-data:/data/wiki/

volumes:
  db-data:
  wiki-data:
```