added helm chart release notes

CONTRIBUTING.md

@@ -5,6 +5,11 @@ First of all, thank you for contributing to FabCityOS! The goal of this document
 - [Assumptions](#assumptions)
 - [How to Contribute](#how-to-contribute)
 - [Development Workflow](#development-workflow)
+  - [Realease the chart](#realease-the-chart)
+    - [Install the helm push plugin](#install-the-helm-push-plugin)
+    - [Add the Gitlab repository](#add-the-gitlab-repository)
+    - [Build a package](#build-a-package)
+    - [Push the package to Gitlab](#push-the-package-to-gitlab)
 - [Git Guidelines](#git-guidelines)
 - [Release Process (for internal team only)](#release-process-for-internal-team-only)
 
@@ -38,7 +43,7 @@ In order to use the different tools on this repository, you will first need to:
 
 - [Optional: Use the Nix Package Manager](https://nix.dev/tutorials/install-nix). This will allow you to make use of the [nixpkgs](https://github.com/NixOS/nixpkgs), automatically managing all required dependencies from the [`nix shell env`](shell.nix). In addition you also need the [nixpkgs: direnv](https://search.nixos.org/packages?query=direnv) for automatic environment selection.
 
-```bash
+```sh
 k3d cluster create --config k3d-fcoscore-dev.yaml
 ```
 
@@ -50,7 +55,7 @@ helm install --dry-run fcoscore .
 
 You can install and test the Helm chart by running:
 
-```bash
+```sh
 helm install fcoscore .
 ```
 
@@ -62,13 +67,13 @@ watch -n 1 kubectl get all --all-namespaces
 
 An easy way to access your FabCityOS instance and test that it is up and running is by using port-forwarding. This can be achieved by running:
 
-```bash
+```sh
 kubectl port-forward --namespace default svc/fcoscore 7700:7700
 ```
 
 Finally, to uninstall the chart, run:
 
-```bash
+```sh
 helm uninstall fcoscore
 ```
 
@@ -84,7 +89,7 @@ helm install --dry-run fcoscore .
 
 Each PR should pass the linter to be accepted.
 
-```bash
+```sh
 # Linter
 helm lint .
 ```
@@ -92,7 +97,7 @@ helm lint .
 Each PR should also check if the generated file `manifests/fcoscore.yaml` is updated with the new modifications.
 You can generated the manifest with the command line:
 
-```bash
+```sh
 helm template fcoscore . | grep -v 'helm.sh/chart:\|app.kubernetes.io/managed-by:' > manifests/FabCityOS.yaml
 ```
 
@@ -104,6 +109,32 @@ Or just by comment the PR:
 
 Additionally, the CI will run a test to check if there are changes introduced to the charts. If changes were introduced, it will require you to update the Chart version.
 
+### Realease the chart
+
+#### Install the helm push plugin
+
+```sh
+helm plugin install https://github.com/chartmuseum/helm-push
+```
+
+#### Add the Gitlab repository
+
+```sh
+helm repo add --username <username> --password <access_token> fabcity-os-core-chart https://gitlab.fabcity.hamburg/api/v4/projects/248/packages/helm/alpha
+```
+
+#### Build a package
+
+```sh
+helm package .
+```
+
+#### Push the package to Gitlab
+
+```sh
+helm cm-push fcoscore-0.0.1.tgz fabcity-os-core-chart
+```
+
 ## Git Guidelines
 
 ### Git Branches <!-- omit in toc -->