keycloak: enable authelia interstitial

roles/keycloak/templates/keycloak.conf.j2

@@ -13,8 +13,11 @@ server {
   add_header X-XSS-Protection "1; mode=block";
   add_header X-Content-Type-Options "nosniff";
 
+  include /etc/nginx/snippets/authelia-endpoint.conf;
+
   location / {
     proxy_pass http://$keycloak:8080;
+    include /etc/nginx/snippets/authelia-auth.conf
     proxy_set_header Host $host;
     proxy_set_header X-Real-IP $remote_addr;
     proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;