make sure that init downloads exactly the last count available images

downloader.mjs

@@ -62,21 +62,26 @@ function downloadImage(time_string, filepath) {
 
 export async function initImages(count) {
     let files = fs.readdirSync('images/');
-    for (let i = count; i >= 0; i--) {
+    let downloaded = 0;
+    let i = 0;
+    while(downloaded < count) {
         let time_string = getTimeString(i);
         let filename = `images/${time_string}.png`;
         if (files.includes(`${time_string}.png`)) {
+            downloaded++;
+            i++;
             continue;
         }
         try {
-            await downloadImage(time_string, filename)
+            await downloadImage(time_string, filename);
+            downloaded++;
         } catch (error) {
             //Response 302, we've reached the latest available image
             if (error.message === '302') {
-                console.log('Could not download image after ' + time_string);
-                return;
+                console.log('Could not download image ' + time_string);
             }
         }
+        i++;
     }
 }
 

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);