add wireguard config removal

docs/user/videos-and-tutorials/release-0.3.0.md

@@ -35,6 +35,46 @@ First of all, don't panic. We have done our best to make the migration as smooth
   There are several lightwheight services that ensures the network configuration desired. If you cannot access the UI after the migration waiting up to 30 minutes should be enoughto ensure the network configuration is restored.
 </details>
 
+<details>
+  <summary><strong>I cannot access dappnode UI and I am using Wireguard as access method</strong></summary>
+
+  If you cannot access the UI after waiting several minutes and you are using wireguard as access method, do not panic you might be experiencing a cache issue.
+  Try refreshing the browser or even closing and reopening the browser. If you still cannot access the UI, try removing the legacy dns from the wireguard configuration:
+
+From:
+
+```config
+[Interface]
+PrivateKey = xxxxxxxxxxxxx
+ListenPort = 51820
+Address = xxxxxxxxx
+DNS = 172.33.1.2, 10.20.0.2
+
+[Peer]
+PublicKey = xxxxxxxxxxxxxxxx
+AllowedIPs = 172.33.0.0/16, 10.20.0.0/24 <- to change!
+Endpoint = xxxxxxxxxxxxxxx
+```
+
+to:
+
+```config
+[Interface]
+PrivateKey = xxxxxxxxxxxxx
+ListenPort = 51820
+Address = xxxxxxxxx
+DNS = 172.33.1.2, 10.20.0.2
+
+[Peer]
+PublicKey = xxxxxxxxxxxxxxxx
+AllowedIPs = 10.20.0.0/24
+Endpoint = xxxxxxxxxxxxxxx
+```
+
+Then restart the wireguard service.
+
+</details>
+
 <details>
   <summary><strong>I cannot access dappnode UI after the migration and I have waited 30 mins</strong></summary>