cockpit packages and their dependencies (if needed). cockpit doesn't have a lot of dependencies though.
Outside what? It is a service listening on port 9090 on the host. If you can reverse proxy to that, then sure you can access it.
How can i update it? Hitting install again when a new update is available or i will find the updates in the "Update Management" tab?
Looking at the "Logs" tab of Cockpit i see lot of errors like these, what could be?