Use helm_apply and misc fixes

charts/prometheus/deploy.sh

@@ -1,4 +1,5 @@
 #!/usr/bin/env bash
+TOP="$(cd "$(dirname "${BASH_SOURCE[0]}")" >/dev/null 2>&1 && pwd)"
 
 crd_version="v0.42.0"
 namespace=prometheus
@@ -29,13 +30,12 @@ install_prometheus_crds () {
     done
 }
 
+cd $TOP
 . ../config.sh
-install_prometheus_crds
-kubectl_apply_files $namespace "${charts[@]}"
-helm template \
-   -n $namespace \
-   -f values.yaml \
-   prometheus \
-   prometheus-community/kube-prometheus-stack \
-   | kubectl_apply $namespace
+
+install_prometheus_crds
+
+kubectl_apply_files $namespace "${charts[@]}"
+
+helm_apply $namespace prometheus prometheus-community/kube-prometheus-stack