make sure that init downloads exactly the last count available images

index.mjs

@@ -1,11 +1,13 @@
 import { initImages, updateImages } from './downloader.mjs';
 
-initImages(10).then(() => {
+const IMAGE_COUNT = 5;
+
+initImages(IMAGE_COUNT).then(() => {
     console.log('Downloaded initial images successfully');
 });
 
 setInterval(() => {
-    updateImages(10).then(() => {
+    updateImages(IMAGE_COUNT).then(() => {
         console.log('Updated images successfully');
     });
 }, 5 * 60 * 1000);