feat: add Hono server entry point with static fallback

server/index.ts

@@ -0,0 +1,22 @@
+import { Hono } from 'hono'
+import { serveStatic } from 'hono/bun'
+import { openDb } from './db'
+import { createBooksRouter } from './routes/books'
+import { createGenerateRouter } from './routes/generate'
+
+const db = openDb(process.env.TEACHING_BOOKS_DB ?? 'data/teaching-books.db')
+
+export const app = new Hono()
+
+app.route('/api/books', createBooksRouter(db))
+app.route('/api/generate', createGenerateRouter(process.env.DEEPSEEK_API_KEY))
+
+app.use('/*', serveStatic({ root: './dist' }))
+app.get('*', serveStatic({ path: './dist/index.html' }))
+
+if (import.meta.main) {
+  Bun.serve({
+    port: process.env.PORT ? Number(process.env.PORT) : 3001,
+    fetch: app.fetch,
+  })
+}