How to deploy a project on vercel with Rest API?

[sullah2]

I am trying to deploy project via rest api following the documentation:
https://vercel.com/docs/rest-api#endpoints/deployments/create-a-new-deployment

I don't have a gitSource and hence will be using files parameter but I am not sure how to reference/attach files in the post request.
The documentation says: A list of objects with the files to be deployed

Could someone please help/guide with a sample post request?

{
    "name":"testingDeployment",
    "files": [

    ],
    "env":{
        "NODE_JS_API": "sdf",
        "SEND_GRID_API": "sdfef"
    }
}

Thank you