initial error pages for network

[AliTopal89]

so I mixed this approach with this because I don't know if it is necessary to create views for error pages if that is the case and you would like me to approach it that way then I can further work on these errors but for the meantime both errors that I created gave me the logs

Processing by ErrorsController#not_found as HTML
  Parameters: {"id"=>"123"}
  Rendered public/404.html within layouts/application (1.1ms)
Completed 404 Not Found in 316ms (Views: 316.0ms | ActiveRecord: 0.0ms)

and

Processing by ErrorsController#internal_server_error as HTML
  Rendered public/500.html within layouts/application (0.1ms)
Completed 500 Internal Server Error in 143ms (Views: 142.1ms | ActiveRecord: 0.0ms)

here are the snapshots as well with really basic css, which I modified from the existing public folder

and

Please let me know if you have any questions or concerns.