Apply suggestion to new app issue template

.gitlab/issue_templates/new_app.md

@@ -5,16 +5,16 @@
 
 * [ ] Create new source if needed in `flux2/infrastructure/sources/APP.yaml`
 * [ ] Include `APP.yaml` in `flux2/infrastructure/sources/kustomization.yaml`
-* [ ] In case of a core app, add `helmRelease` and `deployment` dependencies
-      to `flux2/cluster/base/core.yaml`
+* [ ] In case of a core app, add healthChecks to `core` `Kustomization`
+      (`flux2/cluster/base/core.yaml`)
 * [ ] Add app secret: `install/templates/stackspin-APP-variables.yaml.jinja`
-   * [ ] `flux2/cluster/optional/APP/APP.yaml`
-   * [ ] `flux2/apps/APP/kustomization.yaml`
-   * [ ] If needed, add PVCs in `flux2/apps/APP/pvc.yaml`
-   * [ ] Add `HelmRelease` in `flux2/apps/APP/release.yaml`
-     * Mem resource requests/limits: See https://open.greenhost.net/stackspin/stackspin/-/issues/1027
-      * [ ] mem request: the median weekly memory usage of an app
-      * [ ] mem limit: 150% of the weekly max memory usage
+ * [ ] Flux kustomization: `flux2/cluster/optional/APP/APP.yaml`
+ * [ ] K8s kustomization: `flux2/apps/APP/kustomization.yaml`
+ * [ ] If needed, add PVCs in `flux2/apps/APP/pvc.yaml`
+ * [ ] Add `HelmRelease` in `flux2/apps/APP/release.yaml`
+   * Mem resource requests/limits: See https://open.greenhost.net/stackspin/stackspin/-/issues/1027
+    * [ ] mem request: the median weekly memory usage of an app
+    * [ ] mem limit: 150% of the weekly max memory usage
 
 ### Single sign-on
 
@@ -74,7 +74,8 @@ Add the following elements to `.gitlab-ci.yml`:
   * [ ] `docs/testing_instructions.rst`
   * [ ] `docs/usage.rst`
 
-## Etc
+## Follow-up issues
 
-* [ ] Create follow-up issue with:
-  * [ ] Fine-tune CPU and mem limits (https://open.greenhost.net/stackspin/stackspin/-/  issues/1027)
+Create follow-up issue with:
+
+* [ ] Fine-tune CPU and mem limits (https://open.greenhost.net/stackspin/stackspin/-/issues/1027)