I need to be able to do server side rendering using angular universal

Hi, I have an angular universal application for opening a viewer that can be called in different web or windows based application (i.e. by clicking on a button) and it should be able to have it's own login page in future to be accessed independently as well. The app is now working using an iframe in the caller application if the caller sends all the parameters through URL. However the app needs to get some credentials (i.e. security token) through http headers and not through URL parameters, so it is being ordered by solution architect that the caller needs to be able to send the http headers and the url altogether to this app, and the app should be able to get rendered in the server side by this call and to return fully functional angular application, so the caller can add it to the iframe.