The error pages should be better designed and should contain more useful information (e.g. tell the user to refresh or go back and if persist come to the irc etc.)

A list of the error codes needed (to start):

• 400 – Bad Request
• 401 – Unauthorized
• 403 – Forbidden
• 404 – Not Found
• 500 – Server error
• 502/504 – Gateway error
• 503 – Service Unavailable (rate-limiting error instead of 429)
• Generic ("catch all")