Add custom 404 page #282
Looks like there is already a basic 404 page we can use: https://csclub.uwaterloo.ca/404/, so we just need to register it somehow.
You should add a picture of a confused Codey or something.
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Deleting a branch is permanent. Although the deleted branch may continue to exist for a short time before it actually gets removed, it CANNOT be undone in most cases. Continue?