Merge pull request huggingface#23 from aswinpajayan/aswinpajayan-patch-1

Update gradio-server.mdx: fix issue 19

Author: burtenshaw

units/en/unit2/gradio-server.mdx

@@ -26,6 +26,8 @@ pip install "gradio[mcp]" textblob
 
 ## Creating the Server
 
+> Hugging face spaces needs an app.py file to build the space. So the name of the python file has to be app.py 
+
 Create a new file called `app.py` with the following code:
 
 ```python