# Quick Start for Let's Encrypt with Node.js

```js
npm install --save greenlock-express
```

Manage via API or the config file:

`~/.config/greenlock/manage.json`: (default filesystem config)

```json
{
    "subscriberEmail": "letsencrypt-test@therootcompany.com",
    "agreeToTerms": true,
    "sites": {
        "example.com": {
            "subject": "example.com",
            "altnames": ["example.com", "www.example.com"]
        }
    }
}
```