Update app.py

app.py

@@ -684,5 +684,12 @@ def main():
 
     app.launch()
 
+import os
+
 if __name__ == "__main__":
-    main()
+    port = int(os.environ.get("PORT", 7860))
+    demo.launch(
+        server_name="0.0.0.0",
+        server_port=port,
+        share=False
+    )