Readme updated for API integration

Author: Francis S. Spencer

README.md

@@ -12,7 +12,8 @@ NOTE:  This extension is just an example of how to create a new entity, not an u
 4. Create the entity Interface under Api/Data
 5. Create a custom SearchResultInterface under Api/Data
 6. Create the Repository Model by implementing the interface you created in step 3 and put your logic within each method and using your custom SearchResultInterface for the getList() method
-7. Put a preference value in di.xml for each interface you created
+7. Put a preference value in etc/di.xml for each interface you created
+8. Create the endpoints for the API under etc/webapi.xml
 
 IMPORTANT: For interfaces, make sure to put the right Phpdoc comments based on the classes or data types that each method uses for parameters en return values, otherwise it won't work.