[Auth] Redirect user to the home page instead of a 500 page if their auth tokens fail to be refreshed

[billhimmelsbach]

Currently when a user loses connection to our app (closing their laptop lid, losing internet connection, etc), a user could resume their connection but try to make API calls with expired tokens. Instead of being taken to a 500 page, they should be redirected to the home page as a MVP solution.

• Since it looks like users are getting redirected to the /500 url itself, and not just the url staying the same but showing the 500 page, seems like it's probably related to the useError500 function. It's used 3 or so times in the app.
• I'll message you with the recording with me showing this behavior.
• Let me know if you want any help re-creating the issue, I wrote up how to adjust the keycloak timeout over here in this PR.
• Just redirecting these users to the unauthenticated home page seems like a good place to start.

[billhimmelsbach]

Going to update the description here with some of the references we chatted about now. 👍