chore: scaffold node/ts/vitest project with health endpoint

server/src/app.ts

@@ -0,0 +1,26 @@
+import Fastify, { FastifyInstance } from 'fastify'
+import Database from 'better-sqlite3'
+import type { Config } from './config.js'
+
+declare module 'fastify' {
+  interface FastifyInstance {
+    db: Database.Database
+    config: Config
+    fetchImpl: typeof fetch
+  }
+}
+
+export interface AppOptions {
+  db: Database.Database
+  config: Config
+  fetchImpl?: typeof fetch
+}
+
+export async function buildApp(opts: AppOptions): Promise<FastifyInstance> {
+  const app = Fastify({ logger: false })
+  app.decorate('db', opts.db)
+  app.decorate('config', opts.config)
+  app.decorate('fetchImpl', opts.fetchImpl ?? fetch)
+  app.get('/api/health', async () => ({ ok: true }))
+  return app
+}