Update main.py

main.py

@@ -78,4 +78,4 @@ with gr.Blocks() as app:
     textbox.submit(send_message, [textbox, chatbot], [chatbot])  # Enterでも送信
 
 if __name__ == "__main__":
-    app.launch(server_name="0.0.0.0", server_port=7860)
+    app.launch(server_name="0.0.0.0", server_port=int(os.getenv("PORT", "7860")))