Give the docks input ports

Stocking the dock with items for repair (ship repair, cargo repair, sawmill), is quite tricky if your network is busy. To alleviate this would be useful to give the dock input ports so you can supply it from unit storages. Alternatively, turn the dock into a unit storage so you can set levels min/max of items you always want there.

but it shouldn't be stored in the dock, more like the vehicle building.
where material is only taken when you build something