Looks like this is what nostrplebs is using to share a pubkey via a URL such as `https://nostrplebs.com/s/
An HTML page with this template:
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Discussion
An `.htaccess` with `Redirect 301 "/path" "nostr:npub-goes-here"` also works.
Setup a similar redirect at https://braydon.com/nostr however opted to display the pubkey and a qrcode instead.