chore: docs for fluentbit reload

Signed-off-by: Peter Wilcsinszky <[email protected]>

docs/fluentbit-config-reload.md

@@ -0,0 +1,31 @@
+## Fluent Bit config reload
+
+It is now possible to configure Fluent Bit to reload its configuration on the fly.
+
+This behaviour is disabled by default, but can be enabled with a single configuration option under 
+the Logging's `spec.fluentbit.configHotReload` (legacy method) or the new FluentbitAgent's `spec.configHotReload`:
+
+```
+apiVersion: logging.banzaicloud.io/v1beta1
+kind: FluentbitAgent
+metadata:
+  name: reload-example
+spec:
+  configHotReload: {}
+```
+
+Currently `resources` and `image` is configurable:
+```
+apiVersion: logging.banzaicloud.io/v1beta1
+kind: FluentbitAgent
+metadata:
+  name: reload-example
+spec:
+  configHotReload:
+    resources: ...
+    image:
+      repository: ghcr.io/kube-logging/config-reloader
+      tag: v0.0.5
+```
+
+For all the available configuration options please check the [API docs](https://kube-logging.dev/docs/configuration/crds/v1beta1/fluentbit_types/)