koa-template/server.js

const Koa = require('koa')
const app = new Koa()
const config = require('@config/index.js')

const server = app.listen(config.server.port, () => {
  console.log(`server start on port ${server.address().port}`)
})
module.exports = server

// load middleware module
const koaLogger = require('koa-logger')
const koaCors = require('@koa/cors')
const koaBody = require('koa-body')
const rootRouter = require('@route/index.js')

app.use(koaLogger())
app.use(koaCors({
  credentials: true,
  // allow all origin
  origin: ctx => ctx.get('origin')
}))
app.use(koaBody({
  multipart: true,
  formidable: {
    maxFileSize: 100 * 1024 * 1024 // 100 mb
  }
}))
app.use(rootRouter.allowedMethods())
app.use(rootRouter.routes())