Update app.py

app.py

@@ -20,7 +20,7 @@ def chat_with_searchgpt(user_message="", history=[], max_tokens=2500, temperatur
     if user_message == "":
         return history, user_message
     
-    api_url = "https://text.pollinations.ai/openai"
+    api_url = os.getenv("API_BASE", "")
     headers = {
         "Content-Type": "application/json"
     }