More generic way to choose image upload folder

[michielbdejong]

https://github.com/Inrupt-inc/generator-solid-react/blob/develop/generators/app/templates/src/containers/Welcome/welcome.component.js#L37 will fail if the user's webid document path ends in any filename other than /card, right?

[james-martin-jd]

This is something that is pending more details surrounding Data Discovery, which we'll be exploring in the near future. The core issue is we need a place to store profile images, and there's not currently a great way to discover this data, so some assumptions were made temporarily.