1. npm i
2. npm run build
3. npm start
4. visit http://localhost:3000/abcd

If you change the TOTAL_NUMBER_MIDDLEWARES in generate-middlewares to less than 100, it will work. http://localhost:3000/abcd will show 'Hello world'

If you change the TOTAL_NUMBER_MIDDLEWARESin generate-middlewares.js to equal or larger than 100, it will not work. http://localhost:3000/abcd will time out