Guides updates

docs/NETWORK_TREE.md

@@ -33,7 +33,7 @@ To setup a device named `rapberrypi` as a `Switch` in our network.
 
 - After clicking the `Assign` button in the previous section, the `(AppleTV)` (1) device is now connected to our `raspberrypi` (2).
 
-![Device details](/docs/img/NETWORK_TREE/Network_Page_2_Levels.png)
+![Network page with 2 levels](/docs/img/NETWORK_TREE/Network_Page_2_Levels.png)
 
 - You can see the `raspberrypi` represents the Network node type `Switch` (3)
 - The `(AppleTV)` to `raspberrypi` connection is also displayed in the table of `Connected devices` (4).

docs/WEBHOOK_N8N.md

@@ -1,12 +1,13 @@
 ### Create a simple n8n workflow
-![n8n workflow](https://i.imgur.com/2EGrQjt.png)
+
+![n8n workflow](/docs/img/WEBHOOK_N8N/n8n_workflow.png)
 
 ### Specify your email template 
 See [sample JSON](https://github.com/jokob-sk/Pi.Alert/blob/main/back/webhook_json_sample.json) if you want to see the JSON paths used in the email template below
-![Email template](https://i.imgur.com/kcVjGm1.png)
+![Email template](/docs/img/WEBHOOK_N8N/n8n_send_email_settings.png)
 
 ### Get your webhook in n8n
-![n8n webhook URL](https://i.imgur.com/clN8eE5.png)
+![n8n webhook URL](/docs/img/WEBHOOK_N8N/n8n_webhook_settings.png)
 
 ### Configure PiAlert to point to the above URL
-![PiAlert config](https://i.imgur.com/rowJCC7.png)
+![PiAlert config](/docs/img/WEBHOOK_N8N/Webhook_settings.png)