Chore(docs): add docker-compose docs

docs/manual/Quick-Start Guides/13-docker-compose.md

@@ -9,7 +9,7 @@ Our Docker-Compose app has the following features:
 
 - Internal Docker-Compose networks
 
-- `/mnt`, `/root` and `/mnt` are directly accessable inside the Docker-Compose container by default
+- `/mnt`, `/root` and `/cluster` are directly accessable inside the Docker-Compose container by default
 
 - The docker-images and docker volumes, are saved in a special PVC inside the Apps system of TrueNAS SCALE
 
@@ -35,6 +35,6 @@ Our docker-compose solution works almost like using it on the host, but without
 
 #### Video Guide
 
-TBD
+![type:video](https://www.youtube.com/watch?v=QXooywQSfJY)
 
 ##### Additional Documentation