- `docker-compose.yml` 2.0 and 3.0+ have different compatibility
with different Docker versions and it's
[preferable](https://stackoverflow.com/a/53636006/961092)
to use 2.0 when you don't use swarm;
- without logging settings in `docker-compose.yml`
Monit container could clog host machine disk space
with log in a long-running scenario