You can't ask people in 2022 to upload their own face to your site, you don't even have a privacy policy, not that it would help much. Come on man.
You can put a "By uploading an image you agree to our Terms of Service and Privacy Policy" text on the website with the links. This is not a legal advice of course, I cannot be sure that this makes your Terms of Service enforceable, but this is how others like Imgur do it.