Create a custom 404 (missing) page?

[namurphy]

If we go to a page on our website that does not exist, we currently get a pretty standard 404 missing webpage page. It would be helpful to have a page for 404 errors that:

• Tells the user that the URL does not exist
• Links back to our main PlasmaPy website
• Links to our documentation page (maybe)
• Links to our GitHub repository (maybe)
• Asks users to submit an issue if they found a missing link on our website.

The errorpages plugin for Nikola looks potentially useful, though I did not look into that at all.

[kennykytran]

Hello! I want to take on this issue if that's okay with you.

[namurphy]

Sure, please do! I'm not quite sure how to do this, but hopefully the documentation on Nikola's website or for Nikola extensions would be helpful in doing that. Thanks!