Update contributor documentation with local build + instal instructions

.gitignore

@@ -1,2 +1,5 @@
 TODOS.md
-__snapshot__/
+__snapshot__/
+
+# ignore downloaded dependencies (typically .tar.gz)
+charts/icinga-stack/charts/ 

CONTRIBUTING.md

@@ -19,6 +19,34 @@ Before contributing changes, please take a moment to review open/closed issues a
 
 Once the issue has been opened and discussed, you can start working on your changes. Please fork the repository and create a new branch for your changes. Once you are done with your changes, please open a new pull request and reference the issue you created in the description.
 
+### Templating the chart(s) locally
+
+Charts can be templated locally using `helm template <path-to-chart` from `charts/icinga-stack`. It might be needed to install missing remote dependencies before doing so:
+
+> [!NOTE]
+> Some values might be required for templating to succeed.
+> Simple dummy values are provided in [`charts/icinga-stack/tests/required-values.yaml`](./charts/icinga-stack/tests/required-values.yaml) for all charts.
+
+```sh
+$ cd charts/icinga-stack
+$ helm dep update
+$ helm template . -f tests/required-values.yaml > icinga-stack-manifests.yaml
+$ helm template ./charts/icinga2 -f tests/required-values.yaml > icinga2-manifests.yaml
+```
+
+### Deploying the chart(s) locally
+
+Charts can be installed and upgraded locally `helm install .` from their respective root directories:
+
+> [!NOTE]
+> Some values might be required for templating to succeed.
+> Simple dummy values are provided in [`charts/icinga-stack/tests/required-values.yaml`](./charts/icinga-stack/tests/required-values.yaml) for all charts.
+
+```sh
+$ helm install <release> . -f tests/required-values.yaml
+$ helm update <release> . -f tests/required-values.yaml
+```
+
 ## Testing changes
 
 For testing the charts in this repository, we use [helm-unittest](https://github.com/quintush/helm-unittest) and [Docker](https://docker.com). Please refer to the[helm-unittest documentation](https://github.com/quintush/helm-unittest) and [Docker documentation](https://docs.docker.com/get-docker/) for installation instructions.
@@ -35,7 +63,7 @@ This will test all the Helm templates in the `./templates/` directory against th
 
 To maintain a certain style of tests throughout the charts, please adhere to the following conventions when writing new tests:
 
-* Tests for subcharts should be placed in the `./tests` directory of the parent chart and prefixed with the subchart's name, e.g. `icingaweb2_deployment_test.yaml`.
-* Tests should be grouped by the template they are testing.
-* Test files should be named after the template they are testing, e.g. Icinga Web's `deployment.yaml` should be tested in `icingaweb2_deployment_test.yaml`.
-* **Test Suites** should be prefixed with the name of the product/chart they test, e.g. *[Icinga 2] Test Icinga 2 persistence*
+- Tests for subcharts should be placed in the `./tests` directory of the parent chart and prefixed with the subchart's name, e.g. `icingaweb2_deployment_test.yaml`.
+- Tests should be grouped by the template they are testing.
+- Test files should be named after the template they are testing, e.g. Icinga Web's `deployment.yaml` should be tested in `icingaweb2_deployment_test.yaml`.
+- **Test Suites** should be prefixed with the name of the product/chart they test, e.g. _[Icinga 2] Test Icinga 2 persistence_

charts/icinga-stack/Chart.lock

@@ -0,0 +1,6 @@
+dependencies:
+- name: common
+  repository: oci://registry-1.docker.io/bitnamicharts
+  version: 2.19.2
+digest: sha256:e8815a21c72dd685b5573d0baeeeff733db3bc6d77b30c95a78ff316188e8a65
+generated: "2024-05-06T15:03:37.600822+02:00"