- Fix Docker Compose obsolete setting

## Remove `version`

Fix the following error:

```
WARN[0000] /docker-compose.yml: `version` is obsolete
```

see also.
https://github.com/compose-spec/compose-spec/blob/master/spec.md#version-top-level-element-obsolete

## Rename: docker-compose.yml -> compose.yml

The preferred file name is now `compose.yml`.

> The default path for a Compose file is compose.yaml (preferred)

ref.
https://docs.docker.com/compose/compose-application-model/#the-compose-file

Release Notes:

- N/A