Update app.py

app.py

@@ -19,4 +19,4 @@ def proxy(path):
     return response.content, response.status_code, response.headers.items()
 
 if __name__ == '__main__':
-    app.run()
+    app.run(host='0.0.0.0',  port=int(os.environ.get('PORT', 7860)))