Initial commit: installable PWA hello world

React + TypeScript + Tailwind v4 + shadcn/ui frontend (client), Express +
better-sqlite3 backend (server) in a pnpm workspace. Includes vite-plugin-pwa
manifest, service worker, and iOS install meta tags. GET /api/hello increments a
visit counter in SQLite; backend serves the built client in production.

server/src/index.ts

@@ -0,0 +1,32 @@
+import express from "express"
+import fs from "node:fs"
+import path from "node:path"
+import { fileURLToPath } from "node:url"
+
+import { helloRouter } from "./routes/hello.js"
+
+const __dirname = path.dirname(fileURLToPath(import.meta.url))
+
+const app = express()
+const PORT = process.env.PORT ? Number(process.env.PORT) : 3001
+
+app.use(express.json())
+
+app.get("/api/health", (_req, res) => {
+  res.json({ ok: true })
+})
+
+app.use("/api", helloRouter)
+
+// In production, serve the built client (client/dist) and fall back to index.html.
+const clientDist = path.resolve(__dirname, "../../client/dist")
+if (fs.existsSync(clientDist)) {
+  app.use(express.static(clientDist))
+  app.get("*", (_req, res) => {
+    res.sendFile(path.join(clientDist, "index.html"))
+  })
+}
+
+app.listen(PORT, () => {
+  console.log(`Pocket Pascal server listening on http://localhost:${PORT}`)
+})