Make documentation standalone and generalize examples

docs/interface/index.md

@@ -1,9 +1,10 @@
 # The dashboard app
 
 Open your instance's app address, or select it at [fluksio.com](https://fluksio.com)
-after enrollment. For the local Docker setup, use
-[app.localhost](http://app.localhost) and the admin login printed by
-`make init`. See [Getting started](../getting-started/index.md) for setup.
+after enrollment. For the single-container setup, open
+[localhost:8080](http://localhost:8080) and use the admin login printed by
+`docker compose logs fluksio`. See [Getting started](../getting-started/index.md)
+for setup.
 
 ## Finding your way around