To launch the server :
node app.js
To test with curl :
curl -i "http://localhost:3001/cities"
curl -i "http://localhost:3001/cities?search=Indigo"
curl -i "http://localhost:3001/cities/Indigo"
curl -i --data "name=nameValue&description=descriptionValue" "http://localhost:3001/cities"
curl --request DELETE "http://localhost:3001/cities/Indigo"