Add necessary proxy headers with proxy_set_header

@@ -48,13 +48,6 @@
                     listen:
                       - port: 80
                     server_name: vueapp.test.vue.gov.py
-                  locations:
-                    - location: /
-                      proxy:
-                        pass: http://jbosseap_test/
-                        set_header:
-                          field: Host
-                          value: $host
                   #Configure this to redirect to HTTPS, as of 26-oct-22, it should only be available for test
                   rewrite:
                     return:
@@ -77,13 +70,18 @@
                       proxy:
                         pass: http://jbosseap_test/
                         set_header:
-                          field: Host
-                          value: $host
+                          #Equivalent to ProxyPreserveHost on from Apache HTTPd Server. It is necessary to work with RH SSO correctly
+                          - field: Host
+                            value: $host
+                          - field: X-Forwarded-For
+                            value: $remote_addr
+                          - field: X-Forwarded-Proto
+                            value: $scheme
                   sub_filter:
                     sub_filters:
                       #This is necessary for vue_firmador_api.war, to allow local connections to websocket in 127.0.0.1 with only http
-                      - string: localhost
-                        replacement: 127.0.0.1
+                      - string: 'localhost'
+                        replacement: '127.0.0.1'
                     once: false
                     types:
                       - text/css