fix: API GET /render

requirements.txt

 Flask>=2.0.3
-dotenv
+dotenv>=0.9.9
 gradio_client>=1.7.0
 pydantic>=1.8.2
 requests>=2.26.0

src/controllers/render_controller.py

@@ -15,4 +15,4 @@ class RenderController:
 
         print(result)
 
-        return "Hello, World!"
+        return str(result)