[keycloak-user] Keycloak JS adapter iframe origin

We have angular app and we use nginx in a docker image to deploy it. I'm trying to pass the keycloak url to the js adapter by using a constant like this: new Keycloak(url: '/idp'); and in nginx's config I try to proxy that constant to the passed args to the docker image: location /idp { proxy_pass ${IDP_PROTOCOL}://${IDP_ADDR}/${IDP_CONTEXT_PATH}; } When the logic in checkLoginIframe tries to send cross-origin request it fails because the adapter uses our app's origin. Is there any way to be able to proxy that via nginx? If I disable checkLoginIframe can the session be tracked when expired and etc?