docker files fixes from liaqat

src/Managing.Infrastructure.MongoDb/Configurations/Document.cs

@@ -0,0 +1,13 @@
+using MongoDB.Bson;
+using MongoDB.Bson.Serialization.Attributes;
+
+namespace Managing.Infrastructure.MongoDb.Configurations
+{
+    public abstract class Document : IDocument
+    {
+        [BsonId]
+        public ObjectId Id { get; set; }
+        [BsonDateTimeOptions]
+        public DateTime CreatedAt => Id.CreationTime;
+    }
+}