Initial MVP: DocFast PDF API

- HTML/Markdown to PDF conversion via Puppeteer
- Invoice and receipt templates
- API key auth + rate limiting
- Dockerfile for deployment

src/routes/health.ts

@@ -0,0 +1,7 @@
+import { Router } from "express";
+
+export const healthRouter = Router();
+
+healthRouter.get("/", (_req, res) => {
+  res.json({ status: "ok", version: "0.1.0" });
+});