Ohh I see, I made a mistake converting this from Next.js routing. It's
not that we had a URL search parameter named `outfitId`; it's that if
you were coming from the `/outfits/:outfitId` route, it would use that!
I still haven't gotten the rest of the site to point that route to this
page, but I'll do that in a later change.
We add jsbuilding-rails to get esbuild running in the app, and then we copy-paste the files we need from impress-2020 into here!
I stopped at the point where it was building successfully, but it's not running correctly: it's not sure about `process.env` in `next`, and I think the right next step is to delete the NextJS deps altogether and use React Router instead.
