add architecture overview svg to docs

Author: maltesander

docs/modules/demos/images/argo-cd-git-ops/architecture-overview.svg

@@ -14,12 +14,14 @@ All products and manifests are synced and deployed via ArgoCD (except ArgoCD its
 
 The key points to show are:
 
-* GitOps: How to deploy my changes from a Git repository to my cluster
-* Secrets: How to safely deploy credentials, access keys and store them in a Git repository
-* Although not included in this Demo, it assumes / tries to imitate a possible 
-  multicluster setup for development, staging and production.
+* GitOps: How to deploy changes from a Git repository to my cluster?
+* Secrets: How to safely store and deploy credentials, access keys from a Git repository?
 * Interaction with Stackable products (e.g. Airflow and DAGs via gitsync)
 
+ArgoCD and other deployed products and dependencies are illustrated in the following diagram: 
+
+image::argo-cd-git-ops/architecture-overview.svg[]
+
 Install this demo on an existing Kubernetes cluster:
 
 [source,console]
@@ -44,16 +46,18 @@ To run this demo, your system needs at least:
 
 This demo consists of multiple parts:
 
-* Bootstrapping via `stackablectl`
-** Install {argo-cd}[Argo CD] via `stackablectl`. 
-* After the initial bootstrapping, ArgoCD takes over the deployment:
-** Install a {sealed-secrets}[Sealed Secrets] controller to handle sensitive data like credentials or secret keys.
-** Install all Stackable operators using an `ApplicationSet`.
-** Spin up requirements like Minio and Postgres as `Application`.  
-** Deploy Stackable Airflow manifests in their respective `Projects`.
-** DAGs are synced via Airflow gitsync, not ArgoCD.
-** Airflow uses the Kubernetes executor and write its logs to S3 / Minio.
-** DAGs can be started manually in the Airflow webserver UI
+* Bootstrapping via `stackablectl`:
+** Install {argo-cd}[Argo CD] via `stackablectl`
+* Deploy components via ArgoCD:
+** Install a {sealed-secrets}[Sealed Secrets] controller to handle sensitive data like credentials or secret keys
+** Install all Stackable operators using an `ApplicationSet`
+** Install requirements like Minio and Postgres as `Application`
+** Deploy Stackable Airflow manifests into their respective `Projects`
+* Inspect ArgoCD UI
+* Inspect Airflow and start DAGs
+** Checkout Airflow UI and synced DAGs (the DAGs are synced via gitsync, not ArgoCD)
+** Start a DAG and inspect the logs written to S3 / Minio by the Kubernetes executor
+* Optional: Inspect Minio UI for logs
 
 TODO: arch overview image