Project: Documents API will be deprecated

Project: Documents API will be deprecated

We were about to integrate a file uploader to our project creation form to attach files to new projects in Zoho, but we saw this notification on the Documents API section:

The Documents API will be deprecated as it will shortly be merged with Zoho Docs.

Is there documentation on how to use the Zoho Docs API to push documents specific to project IDs? We need to make sure files are submitted and match to projects, not submitted to a large disconnected repository.

Thank you-