Update app.py

app.py

@@ -4,12 +4,15 @@ import os
 
 app = FastAPI()
 
-OPENROUTER_API_KEY = os.getenv("OPENROUTER_API_KEY")  # HuggingFace Secrets এ add করুন
+# OpenRouter API key
+OPENROUTER_API_KEY = os.getenv("OPENROUTER_API_KEY")
 
+# Root route
 @app.get("/")
 def home():
     return {"message": "Molbot is running 🚀"}
 
+# Chat route
 @app.post("/chat")
 async def chat(request: Request):
     data = await request.json()