Clean up NextJS build artifact

[ejmg]

Related: #27

As of now, the NextJS build emits a series of errors related to its aggressive caching and the heuristics it tries to employ in determining which pages and routes can be cached. This is what causes the deployment logs to be spammed with API endpoint logging because NextJS literally runs API endpoints in the process of determining what can and cannot be cached.

It would be better that either these routes explicitly declare themselves as not being cached or to rework them to be cache friendly (e.g., don't use request.url and instead rely on passing request params in the body of POST requests, etc). Either way, this would make deployment logs a lot less noisy.

[ejmg]

Closed by #153