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4 changes: 2 additions & 2 deletions README.ko-KR.md
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## 실행 화면

<img src="https://raw.githubusercontent.com/xvlet/amqcli/master/demo.gif" width="80%">
<img src="https://raw.githubusercontent.com/xvlet/amqcli/master/demo.gif" width="100%">

---

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```

> 💡 **환경 변수 치환 지원 (Environment Variable Substitution)**
> `config.yml` 파일 내에서 `${ENV_VAR:-default_value}` 문법을 사용할 수 있습니다.
> `config.yml` 파일 내에서 `${ENV_VAR:-default_value}` 문법을 사용할 수 있습니다.
> 예를 들어 `${MQ_HOST:-127.0.0.1}`은 시스템에 `MQ_HOST` 환경 변수가 설정되어 있으면 그 값을 사용하고, 없다면 기본값인 `127.0.0.1`을 사용한다는 의미입니다. 비밀번호나 주요 설정값을 하드코딩하지 않고 시스템 환경 변수로 안전하게 주입할 때 유용합니다.

### 2. amqcli 실행
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4 changes: 2 additions & 2 deletions README.md
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## Demo

<img src="https://raw.githubusercontent.com/xvlet/amqcli/master/demo.gif" width="80%">
<img src="https://raw.githubusercontent.com/xvlet/amqcli/master/demo.gif" width="100%">

---

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```

> 💡 **Environment Variable Substitution**
> You can use the `${ENV_VAR:-default_value}` syntax within `config.yml`.
> You can use the `${ENV_VAR:-default_value}` syntax within `config.yml`.
> For example, `${MQ_HOST:-127.0.0.1}` tells the application to use the `MQ_HOST` environment variable if it's set in your system. If it is not set, it will fall back to the default value `127.0.0.1`. This is highly useful for securely injecting credentials or host names without hardcoding them in the file.

### 2. Run amqcli
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