Update app.py

app.py

@@ -14,7 +14,10 @@ def get_weather(city: str) -> str:
         city: Name of the city (e.g., 'Paris').
     """
     try:
-        api_key = "your_openweathermap_api_key"
+        api_key = os.getenv("OPENWEATHERMAP_API_KEY")
+        if not api_key:
+            return "OPENWEATHERMAP_API_KEY key not found"
+
         response = requests.get(
             f"http://api.openweathermap.org/data/2.5/weather?q={city}&appid={api_key}&units=metric"
         )