Give admins an option to offer a logged-out experience

[jhenshaw]

Pixelfed's #1 opportunity to drive engagement and adoption is the sharing of beautiful photos to anyone who hits a pixelfed instance. But today, every instance that one hits (without a username) gives a generic login screen.

Admins should have an option to show the local grid of photos to an unauthenticated home page for the instance. Let people browse, even if they're from a different instance, to find others to follow an interact with. Offer sign-up in the header, but give at least some peek as to the marvelous content that is flowing into the instance.

This would make Pixelfed more than just an assortment of identical login pages. Users could be allowed to opt their content in/out of that experience.

[jhenshaw]

wrong sub-project. Moving to Pixelfed/Pixelfed