docs(tutorials): add some placeholders

docs/src/SUMMARY.md

@@ -11,7 +11,9 @@
   - [External resources (optional)](./deployment/external_resources.md)
 - [Troubleshooting](./troubleshooting.md)
 - [Tutorials]()
-  - [Single node adjustments](./tutorials/single_node_adjustments.md)
+  - [Single node cluster adjustments](./tutorials/single_node_cluster_adjustments.md)
+  - [Add or remove nodes (scale up or down)]()
+  - [Install new applications]()
 - [Reference](./reference/README.md)
   - [Architecture]()
   - [FAQ](./reference/faq.md)

docs/src/tutorials/single_node_adjustments.md

@@ -1,23 +1 @@
-# Single node adjustments
-
-Update the following changes, then commit and push.
-
-## Reduce Longhorn replica count
-
-Set the `defaultClassReplicaCount` to 1:
-
-```yaml
-# system/longhorn-system/values.yaml
-{{#include ../../../system/longhorn-system/values.yaml}}
-```
-
-## Disable automated system upgrade
-
-Because the system upgrade controller will try to drain the node,
-the pods will have no place to go on a single node set up.
-
-Remove the system upgrade controller entirely:
-
-```sh
-rm -rf system/system-upgrade
-```
+# Single node cluster adjustments

docs/src/tutorials/single_node_cluster_adjustments.md

@@ -0,0 +1,23 @@
+# Single node cluster adjustments
+
+Update the following changes, then commit and push.
+
+## Reduce Longhorn replica count
+
+Set the `defaultClassReplicaCount` to 1:
+
+```yaml
+# system/longhorn-system/values.yaml
+{{#include ../../../system/longhorn-system/values.yaml}}
+```
+
+## Disable automated system upgrade
+
+Because the system upgrade controller will try to drain the node,
+the pods will have no place to go on a single node set up.
+
+Remove the system upgrade controller entirely:
+
+```sh
+rm -rf system/system-upgrade
+```