docs(chart): fix installation commands

Also: remove the sections "Upgrading" and "Configuration" for now.

[skip ci]

.gitignore

@@ -26,3 +26,5 @@ go.work
 *.swp
 *.swo
 *~
+
+dash0-operator-values.yaml

README.md

@@ -11,7 +11,7 @@ infrastructure to Dash0.
 The Dash0 Kubernetes operator enables gathering OpenTelemetry data from your workloads for a selection of supported
 runtimes. 
 
-The Dash0 Kubernetes operator is currently in beta.
+The Dash0 Kubernetes operator is currently available as a technical preview.
 
 Supported runtimes:
 
@@ -20,4 +20,4 @@ Supported runtimes:
 ## Getting Started
 
 The preferred method of installation is via the operator's
-[Helm chart](https://github.com/dash0hq/dash0-operator/helm-chart/dash0-operator/README.md).
+[Helm chart](https://github.com/dash0hq/dash0-operator/blob/main/helm-chart/dash0-operator/README.md).

helm-chart/dash0-operator/README.md

@@ -28,23 +28,64 @@ https://github.com/dash0hq/dash0-operator/blob/main/README.md.
 Before installing the operator, add the Helm repository as follows:
 
 ```console
-$ helm repo add dash0-operator {TODO: add repository URL}
+helm repo add dash0-operator https://dash0hq.github.io/dash0-operator
+helm repo update
 ```
 
-Then install the operator to your cluster like this:
+Create a file named `dash0-operator-values.yaml` with the following content:
+
+```yaml
+#
+# Note: The required values for the authorization token and OTLP/gRPC endpoint
+# can be copied from https://app.dash0.com/settings (you need to be logged in).
+#
+
+opentelemetry-collector:
+  config:
+    extensions:
+      bearertokenauth/dash0:
+        token: "auth_..." # <- put your actual Dash0 Authorization Token here
+
+    exporters:
+      otlp:
+        auth:
+          authenticator: bearertokenauth/dash0
+        endpoint: "ingress.XX-XXXX-X.aws.dash0.com:4317" # <- pur your actual OTLP/gRPC endpoint here
+
+    service:
+      extensions:
+        - health_check
+        - memory_ballast
+        - bearertokenauth/dash0
+```
+
+Edit the file to replace the placeholders for the token and the endpoint.
+The required values can be found in the Dash0 web application at https://app.dash0.com/settings.
+
+Then install the operator to your cluster via Helm with the following command:
 
 ```console
-helm install dash0-operator dash0-operator ... TODO ...
+helm install \
+  --namespace dash0-operator-system \
+  --create-namespace \
+  --values dash0-operator-values.yaml \
+  dash0-operator \
+  dash0-operator/dash0-operator  
 ```
 
-## Upgrading
+## Uninstallation
 
-TODO
+To remove the Dash0 Kubernetes Operator from your cluster, run the following command:
 
-## Configuration
+```
+helm uninstall dash0-operator --namespace dash0-operator-system
+```
 
-TODO
+Depending on the command you used to install the operator, you may need to use a different Helm release name or
+namespace.
 
-```yaml
-...
+Optionally, remove the namespace that has been created for the operator:
+
+```
+kubectl delete namespace dash0-operator-system
 ```