nodeinfo wrong host

### Site

https://fedi.woodpeckersnest.space/

### Version

2026.08.08.e6a2887a

### Instance

https://fedi.woodpeckersnest.space/

### Browser

Brave: 1.93.138 (Aug 21, 2026)

### Bug description

Looks like phanpy is making a request to itself instead of the remote instance.

Aug 21 21:10:27 pandora.woodpeckersnest.space nginx[692451]: pandora.woodpeckersnest.space fedi: 2026/08/21 21:10:27 [error] 692451#692451: *94962 open() "/var/www/phanpy/mastodon.social/.well-known/nodeinfo" failed (2: No such file or directory), client: fd42:42:42::20, server: fedi.woodpeckersnest.space, request: "GET /mastodon.social/.well-known/nodeinfo HTTP/2.0", host: "fedi.woodpeckersnest.space", referrer: "https://fedi.woodpeckersnest.space/"

### To reproduce

Sorry, as for the previous bug report, I just found out about these logs and wouldn't know how to reproduce.

### Expected behavior

_No response_

### Other

_No response_

Start by tracing the request that produces `/mastodon.social/.well-known/nodeinfo`, using the reported nginx log and the `.well-known/nodeinfo` endpoint as references. Compare the constructed URL with the remote instance URL; done means nodeinfo requests go to the remote instance instead of the local Phanpy host.

Written by the indexing model from the issue text.