[feature] Allow frontpage to redirect to a specific instance profile

Is your feature request related to a problem ?

Gotosocial is often used for single user instances. As such it would be nice to have a built-in mechanism that redirected users who access the instances main page to be redirected to a profile. Similar to what Mastodon offers.

Describe the solution you'd like.

Add a setting or a config that enables single user mode, making requests going to the instances domain redirect to a specified user profile.

The setting could also potentially make the root domain display the users page without any redirects. Allowing the instance to be used as a personal website of sorts.

Describe alternatives you've considered.

You can easily create such redirection using a reverse proxy. But not everyone as the skills required to do so.

Additional context.

No response

superseriousbusiness / gotosocial