Update run_app.py

run_app.py

@@ -199,7 +199,7 @@ def run_api(
     if bind is not None:
         host, port = bind.split(":")
     uvicorn.run(
-        f"create_app{'_debug' if debug else ''}",
+        f":create_app{'_debug' if debug else ''}",
         host=host, port=int(port),
         workers=workers,
         use_colors=use_colors,