docker 리소스 정리 디스크 용량 확보

```bash
docker system prune -a -f
```

```bash
.
.
.
4kxich1aat7qxleufh8jafmkc
7v0zef7iwirjiohu47ljzkpu5
xukuesxgjqv2wy273tst4mlgw

Total reclaimed space: 10.31GB
```

# ref
- https://ngela.tistory.com/90