docs: Update helm install commands (#719)

Author: xeniape

docs/modules/opa/examples/getting_started/getting_started.sh

@@ -19,16 +19,9 @@ fi
 
 case "$1" in
 "helm")
-echo "Adding 'stackable-dev' Helm Chart repository"
-# tag::helm-add-repo[]
-helm repo add stackable-dev https://repo.stackable.tech/repository/helm-dev/
-# end::helm-add-repo[]
-echo "Updating Helm repo"
-helm repo update
-
 echo "Installing operators with Helm"
 # tag::helm-install-operators[]
-helm install --wait opa-operator stackable-dev/opa-operator --version 0.0.0-dev
+helm install --wait opa-operator oci://oci.stackable.tech/sdp-charts/opa-operator --version 0.0.0-dev
 # end::helm-install-operators[]
 ;;
 "stackablectl")

docs/modules/opa/examples/getting_started/getting_started.sh.j2

@@ -19,16 +19,9 @@ fi
 
 case "$1" in
 "helm")
-echo "Adding 'stackable-dev' Helm Chart repository"
-# tag::helm-add-repo[]
-helm repo add {{ helm.repo_name }} {{ helm.repo_url }}
-# end::helm-add-repo[]
-echo "Updating Helm repo"
-helm repo update
-
 echo "Installing operators with Helm"
 # tag::helm-install-operators[]
-helm install --wait opa-operator {{ helm.repo_name }}/opa-operator --version {{ versions.opa }}
+helm install --wait opa-operator oci://{{ helm.repo_url }}/{{ helm.repo_name }}/opa-operator --version {{ versions.opa }}
 # end::helm-install-operators[]
 ;;
 "stackablectl")

docs/modules/opa/pages/getting_started/installation.adoc

@@ -34,14 +34,10 @@ Helm::
 +
 --
 You can also use Helm to install the operator.
-Add the Stackable Helm repository:
 
-[source,shell]
-----
-include::example$getting_started/getting_started.sh[tag=helm-add-repo]
-----
+NOTE: `helm repo` subcommands are not supported for OCI registries. The operators are installed directly, without adding the Helm Chart repository first.
 
-Then install the Stackable OPA operator:
+Install the Stackable OPA operator:
 
 [source,shell]
 ----

docs/templating_vars.yaml

@@ -1,6 +1,6 @@
 ---
 helm:
-  repo_name: stackable-dev
-  repo_url: https://repo.stackable.tech/repository/helm-dev/
+  repo_name: sdp-charts
+  repo_url: oci.stackable.tech
 versions:
   opa: 0.0.0-dev