Add Parcel Shop Info

Add Information and FAQ anout the Parcel Shop.

docs/facilities.md

@@ -14,7 +14,7 @@ A punk Späti selling snacks, toothbrushes, tobacco, sun screen and everything e
 
 ## Parcel Shop
 
-To send and receive packages on the campsite.
+To send or receive Parcels on the campsite talk to [The Border Gateway for Parcels (BGP)](faq.md#parcel-delivery-to-and-from-the-camp).
 
 ## Security
 ## Awareness