docs: Update README.md (#9)

Author: asbiin

README.md

@@ -1,3 +1,26 @@
 # Monica Helm Charts
 
-This helm charts is in development, don't use it yet...
+[Helm](https://helm.sh) repo for different charts related to Monica which can be installed on [Kubernetes](https://kubernetes.io)
+
+### Add Helm repository
+
+To install the repo just run:
+
+```bash
+helm repo add monica https://monicahq.github.io/helm/
+helm repo update
+```
+
+### Helm Charts
+
+* [monica](https://monicahq.github.io/helm/)
+
+  ```sh
+  helm install my-release monica/monica
+  ```
+
+  ```sh
+  helm upgrade --install monica monica/monica --create-namespace --namespace monica
+  ```
+
+For more information, please checkout the chart level [README.md](./charts/monica/README.md).