server-requests.js

// Sending an HTTP Request from a NodeJS server

//const http = require("http");
const https = require("https");

const Stream = require("stream").Transform;
const fs = require("fs");

https
  .get("https://api.nasa.gov/planetary/apod?api_key=DEMO_KEY", resp => {
    let data = "";

    // A chunk of data has been recieved.
    resp.on("data", chunk => {
      data += chunk;
    });

    // The whole response has been received. Print out the result.
    resp.on("end", () => {
      let url = JSON.parse(data).hdurl;
      console.log(url);

      https.get(url, res => {
        //the response should be  an image
        console.log(res.headers);
        console.log(res.headers["content-type"], res.headers["content-length"]);

        if (
          res.statusCode == 200 &&
          res.headers["content-type"] == "image/jpeg"
        ) {
          let img = new Stream();

          res.on("data", chunk => {
            img.push(chunk);
          });

          res.on("end", () => {
            let filename = __dirname + "/apod.jpg";
            fs.writeFileSync(filename, img.read());
          });
        }
      });
    });
  })
  .on("error", err => {
    console.log("Error: " + err.message);
  });

/**
 * Astronomy Picture of the Day (APOD)
 * https://api.nasa.gov/planetary/apod?api_key=[Your API key here]
 * PARAMS:
 * api_key
 * hd [Boolean] default false
 * date [YYYY-MM-DD] default today
 *
 * RESPONSE:
 * copyright
 * date
 * explanation
 * title
 * hdurl
 * url
 * media_type: 'image'
 * service_version: 'v1'
 */

Thank you, more power to you