Fix wrong image folder path

src/common.js

@@ -15,7 +15,9 @@ Common.getImageList = async function (manifestId) {
 
 	folderName += '_iiif';
 
-    return await fs.promises.readdir(`${process.env.IMAGES_DIR}/${folderName}`);
+    let baseFolder = folderName.split('_')[0] + '_' + folderName.split('_')[1] + '_iiif';
+
+    return await fs.promises.readdir(`${process.env.IMAGES_DIR}/${baseFolder}/${folderName}`);
 }
 /**
  * @param {string} imageId The image's id as a URL to the image server