fix: serve the website dist so Coolify answers GET /

Nixpacks built Vite but had no production start command, so Coolify returned Cannot GET /.

Co-authored-by: Cursor <cursoragent@cursor.com>

docs/EVALS.md

@@ -4,7 +4,15 @@ This file contains small, repeatable checks derived from verified failures. Pref
 
 ## Active failure-derived checks
 
-_No failure-derived checks yet._
+### E-2026-08-17-01 — Website production server answers GET /
+
+- **Prevents:** L-2026-08-17-01 (`Cannot GET /` on Coolify)
+- **Type:** command
+- **How to run:** `npm run website:build`; then from `packages/website` `PORT=34567 node server.mjs` and GET `http://127.0.0.1:34567/`
+- **Pass condition:** HTTP 200 and body contains `LexAI`; `/healthz` returns `ok`
+- **Failure signal:** `Cannot GET /`, connection refused, or 500 `dist/ missing`
+- **Cost:** fast
+- **Last verified:** 2026-08-17 pass (status 200, title present)
 
 ## Eval template