Update app.py

app.py

@@ -11,7 +11,13 @@ from toolz import pluck
 from piffle.image import IIIFImageClient
 
 
-DESCRIPTION = "# Identify illustrations in pages of historical books using their IIIF Manifest"
+DESCRIPTION = """
+**tl;dr** this project develops a machine learning model which can tell you whether a page of a historical book contains an illustration or not.
+
+[IIIF](https://iiif.io/get-started/) is a standard for sharing images that many libraries, archives and museums use. One part of the IIIF standard is the [presentation API](https://iiif.io/api/presentation/3.0/) which defines a way of representing multiple images which make up a digitised physical item such as a book as a JSON document. This app allows you to pass the URL for one of these manifests and return all of the book pages containing illustrations. 
+
+You can read more about how we created the model and training data for this project in this [GitHub repository](https://github.com/davanstrien/ImageIN/)
+"""
 
 HF_MODEL_PATH = (
     "ImageIN/levit-192_finetuned_on_unlabelled_IA_with_snorkel_labels"