add annoation examples to nginx

website/src/content/docs/guides/ingress/nginx.md

@@ -3,4 +3,31 @@ title: NGINX
 ---
 
 
-TBD
+## Annotations Examples
+
+Here we will showcase some annotations you can use to customise your NGINX ingress behavior
+
+### Auth
+
+For Authelia, Authentik and more
+
+```
+annotations:
+  nginx.ingress.kubernetes.io/auth-method: 'GET'
+  nginx.ingress.kubernetes.io/auth-url: 'http://authelia.default.svc.cluster.local/api/authz/auth-request'
+  nginx.ingress.kubernetes.io/auth-signin: 'https://auth.example.com?rm=$request_method'
+  nginx.ingress.kubernetes.io/auth-response-headers: 'Remote-User,Remote-Name,Remote-Groups,Remote-Email'
+```
+
+### Themepark
+
+```
+annotations:
+  nginx.ingress.kubernetes.io/configuration-snippet: |
+      proxy_set_header Accept-Encoding "";
+      sub_filter
+      '</head>'
+      '<link rel="stylesheet" type="text/css" href="https://gilbn.github.io/theme.park/CSS/themes/APP_NAME/THEME.css">
+      </head>';
+      sub_filter_once on;
+```