fix auth header and 426 error from envoy

Author: ELK4N4

apps/koku-ui-onprem/nginx.conf.template

@@ -1,9 +1,13 @@
 location /api {
     proxy_pass ${API_PROXY_URL};
+
+    proxy_set_header Authorization "Bearer $http_x_forwarded_access_token";
     proxy_set_header Host $host;
     proxy_set_header X-Real-IP $remote_addr;
     proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;
-    proxy_set_header X-Forwarded-Proto $scheme;
+
+    proxy_http_version 1.1;
+    proxy_set_header Connection "";
 }
 
 location / {