docs: adjust authentik notes

examples/authentik/README.md

@@ -5,7 +5,19 @@
 
 # Notes
 
-After spawning up this Authentik stack, you will be greeted by Authentik's login dashboard. However, you have to onboard an admin user first. 
+Start by creating a new Docker network for separation:
+
+````
+docker network create authentik-internal
+````
+
+Then adjust the `.env` file with your private secrets and spawn up the stack:
+
+````
+docker compose up -d
+````
+
+After spawning up the Authentik stack, you will be greeted by Authentik's login dashboard. However, you have to onboard an admin user first. 
 
 This is done by visiting the following URL: