meteor__coursera-meteor-1/startup.js

if (Meteor.isServer) {
  Meteor.startup(function () {
    if (Images.find().count() === 0) {
      for (let i = 1; i < 23; i++) {
        Images.insert({
          "img_src": "img_" + i + ".jpg",
          "img_alt": "image number " + i
        });
      } // end of for loop
      Meteor._debug(Images.find().count());
    } // end of if have no images.
  });

}