Can I vibecode ScreenshotOne?

Build me a self-hosted website screenshot API to replace ScreenshotOne for personal use. Requirements:

- Node 22 + Fastify + Playwright (Chromium) + better-sqlite3, one process, no queue system.
- GET /take?url=&format=png|jpeg|webp|pdf&width=&height=&full_page=&delay_ms= renders the
  page in a pooled Chromium context and returns the image bytes directly.
- POST /take accepts raw HTML or Markdown in the body and renders that instead
  (Markdown through marked into a plain template).
- Auth is one API key from .env, checked on every request; 401 without it.
- Cache by hash of the normalized options: metadata in SQLite, files under data/cache/,
  with a cache_ttl option and a fresh=true bypass.
- Block ads and cookie banners the honest way: load EasyList and the
  "I don't care about cookies" filter list at startup, apply them via request
  interception, plus a small CSS hide-list for common consent overlays. Do not
  promise it catches everything.
- Hard 15-second navigation timeout, one retry, then a JSON error with the reason;
  never a hanging request.
- Concurrency capped at a small context pool (default 2) with an in-memory queue,
  so the box does not fall over.
- Out of scope: proxies and IP locations, stealth evasion, scrolling video capture,
  GPU rendering, dashboards, usage billing. That fleet is the paid product.
- README: npx playwright install chromium, .env keys, Chromium memory expectations,
  and a one-line warning that hostile sites will beat this build.