I am building a multi-language website with the recommended load balanced setup. But I am experiencing issues regarding resolving domains of different cultures. The setup consists of an Application Gateway with two App services functioning as master and frontend instances (see documentation). The gateway uses two public urls, one for each language, internally we route all the traffic over one intenal url. Therefore umbraco always thinks it's on the internal url and will serve only one language. Is it possible to listen to the public url in the gateway using a http-header?