docs: Add some tips and tricks for our k8s ops (#115)

docs/k8s/tips-and-tricks.md

@@ -0,0 +1,14 @@
+
+??? tip "Scale down and up Flux kustomize deployment"
+
+    This allows you to make changes in a cluster without having Flux revert your changes all the time.
+    Use it rarely, just during testing, or during troubleshooting.
+    Communicate this change with the rest of the team.
+    ```
+    kubectl -n flux-system scale deployment kustomize-controller --replicas 0 --as root
+    ```
+
+    You can scale back up the deployment with:
+    ```
+    kubectl -n flux-system scale deployment kustomize-controller --replicas 1 --as root
+    ```