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app.use((ctx, next) => {
  console.log('Middleware 1 start')
  ctx.body = {}
  return next().then(() => {
    ctx.body.middleware1Says = 'Middleware 1 here'
    ctx.body.last = 1
    console.log('Middleware 1 done')
  })
})

app.use((ctx, next) => {
  console.log('Middleware 2 start')
  return next().then(() => {
    ctx.body.middleware2Says = 'Middleware 2 here'
    ctx.body.last = 2
    console.log('Middleware 2 done')
  })
})

app.use((ctx, next) => {
  console.log('Middleware 3 start')
  return next().then(() => {
    ctx.body.middleware3Says = 'Middleware 3 here'
    ctx.body.last = 3
    console.log('Middleware 3 done')
  })
})

// Expected log:
// Middleware 1 start
// Middleware 2 start
// Middleware 3 start
// Middleware 3 done
// Middleware 2 done
// Middleware 1 done

// Expected result:

{
  "middleware3Says": "Middleware 3 here",
  "middleware2Says": "Middleware 2 here",
  "middleware1Says": "Middleware 1 here",
  "last": 1
}