Update the repsitories to know the "Add" function

Back/skydiveLogs-api.Data/DropZoneRepository.cs

@@ -32,6 +32,22 @@ namespace skydiveLogs_api.Data
             return _col.Update(updatedDz);
         }
 
+        public bool Add(DropZone newDz)
+        {
+            var result = true;
+
+            try
+            {
+                _col.Insert(newDz);
+            }
+            catch
+            {
+                result = false;
+            }
+
+            return result;
+        }
+
         private readonly IDataProvider _dataProvider;
 
         private readonly LiteCollection<DropZone> _col;