Start adding docs about helm

Signed-off-by: Nikolai Rodionov <allanger@badhouseplants.net>

Author: allanger

docs/install_helm.md

@@ -0,0 +1,32 @@
+# Install with Helm
+
+## Getting started
+
+The only officially supported way to install DB Operator is using a helm chart.
+
+You can find the source code of our helm charts here: <https://github.com/db-operator/charts>
+
+The charts are released as s simple helm repo as well as a an OCI artifact.
+
+To install the repo, run the following
+
+```sh
+$ helm repo add db-operator https://db-operator.github.io/charts
+$ helm search repo db-operator
+```
+
+OCI artifacts are available under `ghcr.io/db-operator/charts/`
+
+To install the chart, run the following:
+
+```sh
+$ helm install db-operator/db-operator
+# -- Or OCI
+$ helm install ghcr.io/db-operator/charts/db-operator:${CHART_VERSION}
+```
+
+More info about the db-operator chart can be found in the [README.md](https://github.com/db-operator/charts/tree/main/charts/db-operator)
+
+## Configure the operator via values
+
+> @allaner chart will be updated soon, and then I'll write a better docs