Fixed links and added BETA to top of self hosting page.

src/guide/self-hosting.md

@@ -1,4 +1,6 @@
-# Self-hosting
+# Self-hosting (BETA)
+The option to self-host is an enterprise feature.  This is currently in the BETA phase of development. It is meant for experimentation and discovery purposes.
+DO NOT use this in production environments.
 
 The Docker image will allow you to setup your self-hosted instances in less than 5 minutes.
 
@@ -17,7 +19,7 @@ You should now be able to access your own `Passwordless.dev` instance at:
 
 ## More Information
 
-- [Configuration](self-hosting/configuration)
-- [Running Locally](self-hosting/running-locally) <Badge text="example" type="warning"/>
-- [Advanced](self-hosting/advanced)
-- [Health-checks](self-hosting/health-checks)
+- [Configuration](self-hosting/configuration.md)
+- [Running Locally](self-hosting/running-locally.md) <Badge text="example" type="warning"/>
+- [Advanced](self-hosting/advanced.md)
+- [Health-checks](self-hosting/health-checks.md)