npm run serve isn't working

[jcoyne]

I checked out the repository and made no changes.
I ran npm install

then I ran

npm run serve

> mirador-integration@1.0.0 serve
> rm -rf dist .parcel-cache && parcel index.html index-umd.html annotation.html

Server running at http://localhost:1234
✨ Built in 1.63s

When I go to: http://localhost:1234/

I see

{"error":"Unexpected endpoint or method. (GET /)"}

This was using node v26.3.1