How to Add external form site in NC and Retrieve Documents from NC

Hi I want to my website form into NC and retrieve attached files using NC.
Now i had form in my website and form includes some 6 attachments with some field of name,email,etc. I want to store these attachments directly in NC and retrieve from NC.
LAMP and NC12 in Ubuntu 16.04LTS X64.
Thanks in advance for Any Help.