Add vaultwarden public instances (move this somewhere if this is not the right place to put it)

Home.md

@@ -56,6 +56,14 @@ Features that probably won't be added unless contributed:
 * [Groups](https://bitwarden.com/help/article/about-groups/)
 * [Custom roles](https://bitwarden.com/help/article/user-types-access-control/#custom-role)
 
+## Public instances
+
+*Note: Use public instances at your own discretion.*
+
+- https://bitwarden.garudalinux.org/
+- https://vault.tedomum.net/
+- https://passwd.hostux.net/
+
 ## Get in touch
 
 To ask a question, offer suggestions, request new features, or get help configuring or installing the software, please [use the forum](https://vaultwarden.discourse.group/).