flux: docs: Update the docs to use ephemeral dirs

Signed-off-by: Kirill <[email protected]>

Author: kksudo

flux/README.md

@@ -92,3 +92,32 @@ spec:
         persistentVolumeClaim:
           claimName: headlamp # The name of the Helm release
 ```
+
+As alternative, you can also use the Use EmptyDir (Ephemeral Shared Volume) to pass files from the init containers to the main container. 
+
+```yaml
+config:
+  pluginsDir: /build/plugins
+initContainers:
+  - command:
+      - /bin/sh
+      - -c
+      - mkdir -p /build/plugins && cp -r /plugins/* /build/plugins/ && chown -R 100:101 /build
+    image: ghcr.io/headlamp-k8s/headlamp-plugin-flux:latest
+    imagePullPolicy: Always
+    name: headlamp-plugins
+    securityContext:
+      runAsNonRoot: false
+      privileged: false
+      runAsUser: 0
+      runAsGroup: 0
+    volumeMounts:
+      - mountPath: /build/plugins
+        name: headlamp-plugins
+volumeMounts:
+  - mountPath: /build/plugins
+    name: headlamp-plugins
+volumes:
+  - name: headlamp-plugins
+    emptyDir: {}
+```