We can create appdb file and include in project using following steps:
Step-1: We can create appdb file using Alter->Serialize App Config.
Step-2: Now select all apps and click on OK button.
Step-3: After click ok button need to save file,we can save file using prefix rs. like rs.appdb.
Step-4: After saved file, need to include it in project. We can copy appdb file and paste it in project and verify it.
Please check your uploaded file extension.
Please Select a file.