Activiti 6 Modeler integration

Hi everyone :

    I am trying to integrate Activiti Modeler of  Activiti 6 to another project.  All the help I found is about Activiti 5.x, moving Modeler from activit-explorer to other framework like spring boot. But the file structure seems changed a lot from 5.x to 6 and activiti-app replaced activiti-explorer.

    Since Activiti 6 is pretty new, I am wondering if there is any document or guide which I can refer to. Or can I just follow the old guide about 5.x on Activiti 6?

Any help will be appreciated. Thanks in advance.