### Install Pusher Beams Node.js SDK with yarn

Source: https://github.com/pusher/push-notifications-node/blob/master/README.md

Installs the Pusher Beams Node.js server SDK using yarn. This is an alternative method for adding the library to your project's dependencies.

```bash
$ yarn add @pusher/push-notifications-server
```

--------------------------------

### Install Pusher Beams Node.js SDK with npm

Source: https://github.com/pusher/push-notifications-node/blob/master/README.md

Installs the Pusher Beams Node.js server SDK using npm. This command adds the necessary package to your project's dependencies.

```bash
$ npm install @pusher/push-notifications-server --save
```

--------------------------------

### Configure Pusher Beams SDK Instance

Source: https://github.com/pusher/push-notifications-node/blob/master/README.md

Initializes the Pusher Beams PushNotifications instance using your instance ID and secret key obtained from the Pusher dashboard. This instance is used for all subsequent notification publishing operations.

```javascript
const PushNotifications = require('@pusher/push-notifications-server');

let pushNotifications = new PushNotifications({
  instanceId: 'YOUR_INSTANCE_ID_HERE',
  secretKey: 'YOUR_SECRET_KEY_HERE'
});
```

--------------------------------

### Publish Notification to Device Interests

Source: https://github.com/pusher/push-notifications-node/blob/master/README.md

Publishes a push notification to devices subscribed to specific interests. It supports platform-specific payloads for APNS (Apple Push Notification Service) and FCM (Firebase Cloud Messaging).

```javascript
pushNotifications.publishToInterests(['hello'], {
  apns: {
    aps: {
      alert: 'Hello!'
    }
  },
  fcm: {
    notification: {
      title: 'Hello',
      body: 'Hello, world!'
    }
  }
}).then((publishResponse) => {
  console.log('Just published:', publishResponse.publishId);
}).catch((error) => {
  console.log('Error:', error);
});
```

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