addedd app.py and model for hf space

.gitignore

@@ -14,6 +14,7 @@ venv/
 
 # PyTorch checkpoints
 *.pt
+! checkpoints/transformer_mnist.pt  # allow the model to be pushed to HF Space
 
 # Gradio session files
 gradio_cached_examples/

app.py

@@ -0,0 +1,8 @@
+# entrpoint for HuggingFace Space 
+
+import sys
+sys.path.append('.')
+
+from app.gradio_app import demo
+
+demo.launch()