Swap to using Gradio Blocks for markdown

Instead of using the greet demo interface, switch to a static markdown page.

app.py

@@ -463,8 +463,10 @@ def run_bot():
 
 threading.Thread(target=run_bot).start()
 
-def greet(name):
-    return "Hello " + name + "!"
-
-demo = gr.Interface(fn=greet, inputs="text", outputs="text")
+with gr.Blocks() as demo:
+  gr.Markdown(
+    r"""
+    # Client for the [HuggingFace Discord](https://hf.co/join/discord) bot
+    All code for this bot is under the [app.py](https://huggingface.co/spaces/discord-community/HuggingMod/blob/main/app.py) file.
+    """)
 demo.launch()