add intro

app.py

@@ -50,7 +50,7 @@ with open("article.md") as f:
 
 interface_options = {
     "title": "Urban Sound 8K Classification",
-    "description": "A Fast AI example with ResNet34 image classification of a sound wav file transformed to a Mel Spectrogram ",
+    "description": "Fast AI example of using a pre=trained ResNet34 vision model for an audio classification task on the [Urban Sounds](https://urbansounddataset.weebly.com/urbansound8k.html) dataset. ",
     #"article": article,
     "interpretation": "default",
     "layout": "horizontal",