Remove app directory and simplify project structure

app/src/index.ts

@@ -1,27 +0,0 @@
-import { serve } from '@hono/node-server'
-import { Hono } from 'hono'
-import { serveStatic } from '@hono/node-server/serve-static'
-
-const app = new Hono()
-
-app.use('*', async (c, next) => {
-  await next()
-})
-
-app.use('/templates/*', serveStatic({ 
-  root: '../templates',
-  rewriteRequestPath: (path) => {
-    return path.replace('/templates/', '')
-  }
-}))
-
-app.get('/', (c) => {
-  return c.text('Hello Hono!')
-})
-
-serve({
-  fetch: app.fetch,
-  port: 4000
-}, (info) => {
-  console.log(`Server is running on http://localhost:${info.port}`)
-})