add from fastapi.responses import HTMLResponse

app.py

@@ -1,10 +1,12 @@
 from fastapi import FastAPI
+from fastapi.responses import HTMLResponse
 
 app = FastAPI()
 
 @app.get("/")
 def read_root():
-    return "<p>This is a model inference point for the <a href='https://huggingface.co/spaces/vishalbakshi/isitadigit'>isitadigit</a> space</p>"
+    html_content = "<p>This is a model inference point for the <a href='https://huggingface.co/spaces/vishalbakshi/isitadigit'>isitadigit</a> space</p>"
+    return HTMLResponse(content=html_content)
 
 if __name__ == "__main__":
     import uvicorn