title: API using nodejs express
body: <p>I have to build an API for weather application using express node.js. since I am not saving any data, I am not using the database. my application allows the user to enter a city name, and the weather information will retrieve directly from the openweathermap.org</p>
  
  <p>the question is, I have a working javascript application, but how to GET the weather data from openweathermap.org in the API route city/:cityName</p>