Upload File in Custom code and get it in Form submission

Design help Custom code
1

Hi Every-One
I need to have a way to Upload a File in any Form through Custom Embed/Code and get this File Data in native File-Submission Web-hook , while having CMS plan . . is there any Solution for this ?

Here is my site Read-Only: LINK
(how to share your site Read-Only link)

2

You can use uploadcare and custom code