Update README.md

README.md

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-# firecrestspawner
+# f7t4jhub: FirecREST for JupyterHub Helm Chart 
 
-A custom spawner for JupyterHub using FirecREST.
-`firecrestspawner` is based on [batchspawner](https://github.com/jupyterhub/batchspawner).
+This is a repository for a Helm chart to deploy JupyterHub using the [firecrestspawner]https://github.com/eth-cscs/firecrestspawner).
+
+### Fetching the repository
+
+```bash
+helm repo add f7t4jhub https://eth-cscs.github.io/firecrestspawner
+helm repo update
+```
+
+The available versions can be listed with
+
+```bash
+helm search repo f7t4jhub/f7t4jhub --versions
+```
+
+### Deploying the chart
+
+```bash
+helm install --create-namespace <deployment-name> -n<namespace> f7t4jhub/f7t4jhub --values values.yaml
+```