Add attachment documentation for Simplepush

source/_integrations/simplepush.markdown

@@ -14,17 +14,55 @@ ha_codeowners:
   - '@engrbm87'
 ---
 
-The `simplepush` platform uses [Simplepush](https://simplepush.io/) to deliver notifications from Home Assistant to your Android device. Unlike similar apps the Simplepush app requires no registration.
+The `simplepush` platform uses [Simplepush](https://simplepush.io/) to deliver notifications from Home Assistant to your Android and iOS device. Unlike similar apps the Simplepush app requires no registration and supports end-to-end encryption.
 
 {% include integrations/config_flow.md %}
 
 To test if the service works, just send a message with `curl` from the command-line.
 
 ```bash
-curl 'https://api.simplepush.io/send/device_key/title/message'
+curl 'https://simplepu.sh/YOUR_SIMPLEPUSH_KEY/message'
 ```
+
+If you enter your password and salt (as defined in the Simplepush app settings) during the configuration of this integration, all notifications sent from this integration will be end-to-end encrypted.
+
 ## Notifications
 
-Simplepush can send a notification by calling the [`notify` service](/integrations/notify/). You can specify the `event` under the `data` key. This will override the event configured in YAML when imported.
+Simplepush can send a notification by calling the [`notify` service](/integrations/notify/).
+
+You can specify the `event` under the `data` key.
+Events can be used to customize the notification behavior.
+
+It is also possible to specify `attachments` under the `data` key.
+Attachments can be images, GIFs or video files that are accessible by a URL.
 
 To use notifications, please see the [getting started with automation page](/getting-started/automation/).
+
+## Examples 
+
+Send a notification with a title and event.
+
+```yml
+- service: notify.simplepush
+    data:
+      title: "This is the title"
+      message: "This is the message"
+      data:
+        event: "event"
+```
+
+Send a notification with four attachments defined by their URL.
+Attachments can be images, GIFs or video files.
+
+```yml
+- service: notify.simplepush
+    data:
+      message: "This is the message"
+      data:
+        attachments:
+          - image: "https://upload.wikimedia.org/wikipedia/commons/e/ee/Sample_abc.jpg"
+          - image: "https://upload.wikimedia.org/wikipedia/commons/d/d3/Newtons_cradle_animation_book_2.gif"
+          - video: "http://commondatastorage.googleapis.com/gtv-videos-bucket/sample/BigBuckBunny.mp4"
+          - video: "http://commondatastorage.googleapis.com/gtv-videos-bucket/sample/ElephantsDream.mp4"
+            thumbnail: "http://commondatastorage.googleapis.com/gtv-videos-bucket/sample/images/ForBiggerEscapes.jpg"
+```