doc: update README

README.md

@@ -1,6 +1,80 @@
 # Kubernetes Operator for NATS Accounting
 
-This project is a Kubernetes Operator for NATS Accounting.
+[![Release](https://github.com/ZEISS/natz-operator/actions/workflows/release.yml/badge.svg)](https://github.com/ZEISS/natz-operator/actions/workflows/release.yml)
+[![Go Reference](https://pkg.go.dev/badge/github.com/ZEISS/natz-operator.svg)](https://pkg.go.dev/github.com/ZEISS/natz-operator)
+[![Go Report Card](https://goreportcard.com/badge/github.com/ZEISS/natz-operator)](https://goreportcard.com/report/github.com/ZEISS/natz-operator)
+[![Taylor Swift](https://img.shields.io/badge/secured%20by-taylor%20swift-brightgreen.svg)](https://twitter.com/SwiftOnSecurity)
+[![Volkswagen](https://auchenberg.github.io/volkswagen/volkswargen_ci.svg?v=1)](https://github.com/auchenberg/volkswagen)
+[![License](https://img.shields.io/badge/License-Apache%202.0-blue.svg)](https://opensource.org/licenses/Apache-2.0)
+
+A Kubernetes operator for [NATS](https://nats.io/) accounting.
+
+## Installation
+
+[Helm](https://helm.sh/) can be used to install the `natz-operator` to your Kubernetes cluster.
+
+```shell
+helm repo add natz-operator https://zeiss.github.io/natz-operator/helm/charts
+helm repo update
+helm search repo natz-operator
+```
+
+## Usage
+
+Creating the operator for the [NATS](https://nats.io/) accounting.
+
+```yaml
+apiVersion: natz.zeiss.com/v1alpha1
+kind: NatsOperator
+metadata:
+  namespace: knative-eventing
+  name: natsoperator-sample
+spec:
+```
+
+Creating an account that supports the use of jetstream.
+
+```yaml
+apiVersion: natz.zeiss.com/v1alpha1
+kind: NatsAccount
+metadata:
+  namespace: knative-eventing 
+  name: knative-eventing-account
+spec:
+  operatorRef:
+    name: natsoperator-sample 
+  allowedUserNamespaces:
+  - knative-eventing
+  imports: []
+  exports: []
+  limits: 
+    disk_storage: -1
+    streams: -1
+    conn: -1
+    imports: -1
+    exports: -1
+    subs: -1
+    payload: -1
+    data: -1
+```
+
+Creating a user account.
+
+```yaml
+apiVersion: natz.zeiss.com/v1alpha1
+kind: NatsUser
+metadata:
+  namespace: knative-eventing
+  name: knative-eventing-user
+spec:
+  accountRef:
+    namespace: knative-eventing
+    name: knative-eventing-account
+  limits:
+    payload: -1
+    subs: -1
+    data: -1
+```
 
 ## License