Fixes regarding Helm after discussing with Nicolas.

README.md

@@ -200,16 +200,15 @@ Copy the `postgresql-pvc.yml`, `postgresql-values.yml`, and `coder-values.yml` f
 scp -J ubuntu@137.194.210.143 postgresql-pvc.yml postgresql-values.yml coder-values.yml core@$MASTER_IP:/tmp
 ```
 
-Once the files are copied, log in to the master node and install Coder.
+Once the files are copied, log in to the master node and install Coder. In the commands below, we use versions of PostgreSQL and Coder that are known to work with Helm 3.2, which is installed by Magnum. But it is also possible to install a newer version of Helm first (see the method documented in [kube-jupyterhub.md](kube-jupyterhub.md)).
 
 ```bash
 ssh -J ubuntu@137.194.210.143 core@$MASTER_IP
 sudo -i
-rpm-ostree install helm # no reboot required
 kubectl create namespace coder
 kubectl apply -f /tmp/postgresql-pvc.yml -n coder
 helm repo add bitnami https://charts.bitnami.com/bitnami
-helm install coder-db bitnami/postgresql -n coder -f /tmp/postgresql-values.yml --version 13.0.0 # latest compatible version with Helm 3.2 and thus coreos 38
+helm install coder-db bitnami/postgresql -n coder -f /tmp/postgresql-values.yml --version 13.0.0 # latest compatible version with Helm 3.2 which is installed by Magnum
 kubectl create secret generic coder-db-url -n coder --from-literal=url="postgres://coder:coder@coder-db-postgresql.coder.svc.cluster.local:5432/coder?sslmode=disable"
 helm repo add coder-v2 https://helm.coder.com/v2
 helm install coder coder-v2/coder --namespace coder --values /tmp/coder-values.yml --version 2.13.5 # Latest stable version