how do I setup Saver for use on my website.

BartLors As Здравко noted, the Dropbox Saver is way for end-users to save files to their own accounts, not a way for end-users to upload files to your account. I'll pass this along as a feature request for a component like that, I can't promise if or when that might be implemented. (And for reference, using the Dropbox Saver does not involve using OAuth or redirect URIs.)

That being the case, like Здравко said, to upload to your own account programmatically, you'd need to implement this in your code, potentially using /2/files/upload or /2/files/get_temporary_upload_link, for example.