added .gitignore

.gitignore

+## Ignore .openapi-generator Folder
+##
+.openapi-generator/
+server/src/Org.OpenAPITools/.gitignore
+
+# Visual Studio cache/options directory
+.vs/
+
+# Visual Studio solution
+*.sln
+
+# build-jobs
+build.*
+
+# database data directory
+data/
+
+#generated readme
+server/README.md
+
+# all generated directories
+Attributes/
+Authentication/
+Controllers/
+Converters/
+Filters/
+Formatters/
+Models/
+OpenAPI/
+Properties/
+wwwroot/
+
+# generated project-files
+*.csproj
+
+# generated Program.cs
+Program.cs
+
+# backup-files
+*.bak

readme.md

@@ -60,13 +60,13 @@ remove sample code and replace it by using the appropriate methods of the corres
 --- 
 
 ### folder `Models`:
-add: 
+add to the classes to be stored in the database (i.e. `Trackable.cs`, `WorldAnchor.cs`, `WorldLink.cs`) : 
 ```
   using MongoDB.Bson;
   using MongoDB.Bson.Serialization.Attributes;
 ```
 
-at the value that is to become the MongoDB ID, add:
+and at the value that is to become the MongoDB ID, add:
 ```
   [BsonId]
   [BsonRepresentation(BsonType.String)]